What Is ESG Investing?
Environmental, Social, and Governance (ESG) investing has become one of the most discussed and debated investment approaches of the past two decades. Whether you view it as a necessary evolution toward responsible capitalism or a dangerous politicization of finance, ESG has fundamentally shaped how trillions of dollars flow through global markets. Understanding what ESG is, how it works, its market impact, and its critics is essential for any investor navigating today’s financial landscape.
Defining ESG: The Three Pillars
ESG investing is an investment approach that incorporates environmental, social, and governance factors into investment decisions alongside traditional financial metrics. Rather than focusing solely on profits and stock price growth, ESG investors consider how companies perform across three distinct dimensions:
Environmental (E): This pillar examines a company’s impact on the natural world. Key metrics include greenhouse gas emissions, energy efficiency, water usage, waste management, renewable energy adoption, climate change risk, and pollution controls. Environmental screening typically favors companies with lower carbon footprints, strong sustainability initiatives, and exposure to clean energy opportunities. It often screens out companies in fossil fuels, tobacco, and other extractive industries.
Social (S): The social pillar focuses on a company’s relationships with employees, customers, suppliers, and communities. Factors include labor practices, diversity and inclusion metrics, supply chain ethics, data privacy, product safety, community engagement, and human rights records. Social screening typically examines whether companies treat workers fairly, maintain diverse leadership, protect consumer privacy, and maintain positive community relationships.
Governance (G): This dimension evaluates how a company is managed and controlled. It examines board composition, executive compensation, shareholder rights, financial transparency, anti-corruption measures, and accountability mechanisms. Good governance screening favors companies with independent boards, appropriate checks and balances, and transparent reporting practices.
These three pillars work together to create a holistic picture of corporate responsibility and sustainability. A company might excel in environmental practices but perform poorly on social or governance metrics, or vice versa.
The History of ESG: From “Who Cares Wins” to Mainstream
The formal origins of ESG investing trace back to 2004 when the United Nations published a landmark report titled “Who Cares Wins?” This report, prepared by an international group of financial institutions working with the UN Environment Programme, argued that incorporating environmental, social, and governance factors into financial analysis was not only ethically sound but also improved long-term financial performance and reduced risk.
The “Who Cares Wins” report was groundbreaking because it reframed responsible investing from a niche ethical concern to a mainstream financial strategy. Rather than arguing that investors should sacrifice returns for values, the report suggested that ESG screening could actually enhance returns by identifying companies with better management practices, lower operational risks, and stronger long-term prospects.
Before 2004, responsible investing existed primarily under different labels: socially responsible investing (SRI), ethical investing, and values-based investing. These approaches generally focused on negative screening—excluding companies involved in weapons, tobacco, alcohol, and gambling. The UN report formalized and broadened this concept into the more comprehensive ESG framework.
From 2004 through the 2010s, ESG investing grew steadily but remained primarily in specialized funds and portfolios. The real acceleration came in the late 2010s and early 2020s. Environmental concerns about climate change, social movements advocating for racial justice and diversity, and corporate governance scandals all converged to make ESG mainstream. Major asset managers like BlackRock began incorporating ESG criteria across their entire product lines, not just specialized funds.
Understanding ESG Scores and Ratings
Just as credit rating agencies rate bond quality, ESG rating agencies assess companies’ performance on environmental, social, and governance factors. However, unlike credit ratings, there is no standardized methodology across ESG rating agencies. This lack of standardization is one of the most significant criticisms of the ESG movement.
MSCI ESG Ratings: MSCI is one of the largest ESG rating providers, used by trillions in assets. MSCI assigns letter ratings from AAA (leader) to CCC (laggard) across 37 different ESG issues organized into ten industries. Their methodology focuses on material ESG issues that are most relevant to financial performance within each industry. A company might be rated AAA for environmental performance but BBB for social factors.
Sustainalytics: Sustainalytics (owned by Morningstar) provides ESG risk ratings on a scale of 0-100, with lower scores indicating lower risk. Their approach emphasizes material ESG issues most relevant to each industry. Sustainalytics rates over 15,000 companies and is widely used by institutional investors.
S&P Global ESG Scores: S&P Global provides ESG scores on a percentile basis, comparing companies within their industry peers. This relative approach attempts to account for industry differences. Like other raters, S&P Global focuses on financially material ESG factors.
Other Major Providers: Additional significant ESG rating agencies include Refinitiv (formerly Thomson Reuters), Bloomberg, and ISS ESG. Each uses different methodologies, different weighting schemes, and different data sources.
The problem is that these ratings frequently diverge dramatically. Studies have shown that correlation between different ESG ratings can be surprisingly low, sometimes below 0.5. This means that a company rated AAA by one agency might be rated B by another. This inconsistency undermines the reliability of ESG as an objective measure and suggests that ESG ratings are more subjective than objective measurements.
The ESG Investment Market: Size and Growth
The global ESG investment market has experienced explosive growth. As of 2025, ESG-focused investments represent approximately $35 trillion in assets under management globally. This includes both dedicated ESG funds and ESG-integrated strategies across conventional asset managers.
For perspective, this represents roughly one-third of all professionally managed assets globally. In developed markets like Europe and North America, the percentage is even higher. The European Union, in particular, has aggressively promoted ESG investing through regulation like the Sustainable Finance Disclosure Regulation (SFDR).
Projections suggest continued growth, though at a slower pace than the 2010s boom. Some forecasters predict ESG assets could reach $191 trillion by 2035, though recent headwinds have slowed growth projections. The picture is more complicated than simple growth, however, as the market has recently experienced significant turbulence.
Major ESG Funds and ETFs
iShares MSCI USA ESG Select ETF (DSI): One of the largest ESG-focused ETFs, DSI tracks companies that meet ESG criteria as defined by MSCI. The fund includes approximately 300 U.S. companies and has experienced significant inflows over the past decade.
Vanguard ESG U.S. Stock ETF (ESGV): Vanguard’s approach to ESG incorporates environmental, social, and governance factors across its U.S. equity offerings. ESGV tracks a broad index of U.S. stocks that meet Vanguard’s ESG criteria, offering low-cost exposure to ESG-screened companies.
Parnassus Core Equity Fund (PRBLX): A pioneering ESG fund that screens for environmental, social, and governance quality while avoiding controversial sectors.
Calvert U.S. Large Cap Growth Fund (CSEIX): A long-established responsible investing fund that combines ESG screening with active management.
Beyond these examples, thousands of ESG-labeled funds exist globally. Many traditional asset managers have created ESG versions of their core offerings. The proliferation of ESG funds has made ESG investing accessible to retail investors through mutual funds and ETFs.
Key Criticisms of ESG Investing
Greenwashing and Lack of Standardization: One of the most serious criticisms is that ESG ratings lack standardization and consistency. Different rating methodologies produce dramatically different results. This allows companies to claim ESG credentials based on whichever rater gives them the highest marks. Without consistent metrics and standards, ESG ratings are vulnerable to greenwashing—the practice of appearing more environmentally responsible than reality.
Inconsistent Ratings Across Agencies: The correlation problem deserves particular emphasis. Studies comparing ESG ratings from different agencies show that companies rated highly by one agency are sometimes rated poorly by another. This suggests that ESG scores reflect rater methodology and philosophy as much as actual company performance. Investors cannot be confident that their ESG fund actually contains companies with strong ESG practices.
Politicization: A significant criticism from conservative and religious investors is that ESG has become politicized, incorporating progressive social and environmental values rather than remaining focused on financially material factors. ESG screening against fossil fuels, for example, may reflect environmental ideology rather than financial analysis. Similarly, ESG emphasis on LGBTQ+ inclusion and racial equity reflects particular social values that not all investors share.
No Standardized Metrics: While ESG concept is straightforward, actual measurement remains chaotic. What counts as “good” governance? How is social impact quantified? Without standardized definitions and measurements, companies can claim ESG virtues based on metrics chosen to flatter them.
Financial Performance Questions: While early proponents argued ESG investing would improve returns, research on this question produces mixed results. Some studies show ESG portfolios outperform, others show underperformance, and many show no significant difference. This undermines the financial case for ESG investing.
Exclusion Consequences: ESG screening excludes large sectors of the economy, potentially reducing diversification and increasing portfolio risk. It may also exclude companies from emerging markets where ESG practices are less developed but where growth opportunities are stronger.
The Anti-ESG Backlash: 2023-2026
Beginning in 2023, ESG investing faced unprecedented backlash from multiple directions. This represented a dramatic shift from the 2010s consensus that ESG was inevitable and desirable.
Outflows and Market Reversal: After nearly two decades of consistent inflows, ESG-focused investments experienced significant outflows beginning in 2023. This trend accelerated in 2024 and 2025. In 2025 alone, ESG funds experienced approximately $84 billion in outflows. This reversal suggests that investor enthusiasm for ESG has peaked or is in sustained decline.
Political Opposition: Conservative politicians and officials launched coordinated campaigns against ESG investing. By 2026, 37 states had enacted or proposed anti-ESG legislation. These laws generally restrict state retirement funds and public pensions from considering ESG factors in investment decisions. Some laws even punish financial institutions that implement ESG strategies.
The “Greenhushing” Trend: As ESG became more controversial, some companies and asset managers began quietly de-emphasizing their ESG commitments. Called “greenhushing,” this trend involves companies reducing public statements about environmental and social goals to avoid controversy. This represents the opposite of the 2010s trend when companies competed to highlight ESG credentials.
Religious and Values-Based Criticism: Significant opposition has emerged from Christian and conservative investors who view ESG as a vehicle for imposing progressive values on corporations. Criticism focuses particularly on ESG’s promotion of LGBTQ+ inclusion, abortion access, and environmental policies that contradict traditional values.
Regulatory Uncertainty: The SEC has proposed and adopted ESG disclosure rules, then faced legal challenges. This regulatory uncertainty has created confusion about what ESG reporting will look like going forward.
ESG and Christian Investing: Similarities and Differences
Many Christians naturally wonder whether ESG investing aligns with or contradicts biblical principles for investing. The answer is complex because ESG and Christian investing overlap in some areas while diverging sharply in others.
Similarities: Both ESG and Christian investing emphasize that investment decisions carry moral dimensions. Both concern themselves with corporate governance quality and accountability. Both recognize that businesses have responsibilities beyond maximum profit extraction. Both express concern about labor practices and treatment of workers, which reflects biblical concern for the poor and vulnerable.
Key Differences: ESG typically doesn’t screen against abortion, contraception, or sexual ethics issues that are central to Christian investing. ESG actively promotes LGBTQ+ inclusion and diversity metrics, which conflicts with the values of traditional Christian investors. ESG emphasizes environmental screening and fossil fuel divestment based on climate ideology, whereas Christian investing may prioritize other values. ESG focuses on material financial factors, while Christian investing incorporates broader biblical worldview principles.
The relationship between ESG and Christian investing is discussed more thoroughly in the article ESG vs. Biblically Responsible Investing.
Can Christians Use ESG Funds?
This question has no universal answer because ESG funds vary widely. Some ESG funds incorporate values that contradict Christian teaching, particularly regarding sexuality and abortion. Other ESG funds align reasonably well with Christian values, particularly regarding governance and labor practices.
Christians considering ESG funds should examine the specific screening criteria and holdings of each fund. A fund that screens against fossil fuels but doesn’t promote abortion or LGBTQ+ ideology differently than traditional funds might be acceptable to some Christian investors. A fund that screens for diversity metrics and corporate contributions to LGBTQ+ organizations would be problematic for many Christian investors.
Rather than assuming all ESG funds are identical, Christians should evaluate each fund against their specific values and biblical convictions. This requires examining fund prospectuses, holdings, and proxy voting records.
Related Resources
For deeper exploration of these topics, consider reading:
ESG vs. Biblically Responsible Investing — A comprehensive comparison of these two distinct investment approaches and their philosophical foundations.
BRI vs. SRI vs. ESG — Understanding the differences and overlaps between biblically responsible investing, socially responsible investing, and ESG.
What is Biblically Responsible Investing? — A detailed exploration of how Christians can invest according to biblical principles.
Christian Investment Screening Criteria — An examination of the values and issues that matter most to Christian investors.
Impact Investing for Christians — How to align investments with kingdom values while seeking positive measurable impact.
Creation Care and Christian Investing — Biblical perspectives on environmental stewardship and investment decisions.
A Stewardship Perspective on ESG
Whether you embrace or reject ESG investing, the underlying principle should guide all Christian investors: stewardship. God has entrusted His creation and resources to us, and we bear responsibility for how we deploy capital. The question is not whether our investments matter morally, but how we discern which moral considerations should guide our choices.
For Christians, this requires integrating financial wisdom with biblical values. ESG offers one framework for considering these questions, but it may not be the framework most aligned with Christian conviction. Biblical stewardship reminds us that investment decisions flow from our deepest commitments about justice, integrity, and love for God and neighbor.
Consider also how investment choices relate to Christian budgeting principles, how we approach biblical perspectives on debt, and how giving relates to our investment strategy through tithing and giving.