ESG: A comprehensive guide to the main principles

ESG: A comprehensive guide designed to get you started as part of your corporate governance education. 

Environmental, Social, and Governance (ESG) factors remain crucial for assessing a company’s commitment to sustainability and ethical behaviour. These non-financial metrics are used by investors, consumers, and regulators to evaluate a company’s performance and long-term potential, making ESG a key driver for continuous improvement and innovation.

ESG is built on three core elements:

• Environmental: This looks at a company’s impact on the planet, focusing on areas like carbon emissions, resource use, waste management, and pollution. It encourages sustainable resource use, lower emissions, and better efficiency.
• Social: This examines a company’s relationships with its staff, customers, suppliers, and communities. It includes labour standards, human rights, diversity, and community engagement. Social sustainability means managing people and suppliers ethically, ensuring fair employment, equal opportunities, work-life balance, and respect for human rights.
• Governance: This assesses a company’s leadership, executive pay, audits, internal controls, and shareholder rights. It covers board structure, employee pay, customer satisfaction, supply chain resilience, business ethics, and transparency.

We’ve updated this guide in 2026, because it’s no secret just how much criticism the movement has received, and will continue to receive in the second half of this decade. This criticism comes from two main areas:

• Entities subject to new reporting requirements in places like the EU, which have pushed back against new regulations (although, so far, this looks to be largely resolved through dialogue)
• Right-wing politicans in countries like the United States have targeted ESG very publicly and vowed to dismantle ESG-related policies as far as possible.

Much of the media attention, and therefore much of the fear in the governance world, comes from the second point above. After all, it’s hard to ignore a political agenda against ESG when it’s backed by the President of the world’s most powerful economy.

Ultimately, it leads us to the question: Is ESG going through an irreversible decline? The answer we continue to solidly lean towards is no. Why? Because when it comes to criticism of ESG, the facts don’t match the rhetoric. There are two main things you should remember:

1. Tens of trillions of dollars continue to be invested in ESG-connected assets worldwide as of 2026, with figures expected to more than quadruple by 2034.
2. While the US government has gone on the offensive against ESG, other major world economies, such as the European Union, Gulf States, and East Asia, have tightened their laws and scrutiny around ESG. This thinking follows decades of political pressure and policy agreements that stand no chance of unravelling in a hurry. Regulators in these jurisdictions continue to develop higher standards and reporting rules to match. In today’s globalised world, it’s more than enough to apply even to companies with headquarters beyond these borders.

The continuing importance of ESG is driven by more awareness among consumers and investors, who now demand greater corporate responsibility for social and environmental impacts. 

Institutional investors are putting ESG factors into their investment decisions, seeing good ESG performance as a sign of long-term success. Governments are also introducing regulations, such as the EU’s Corporate Sustainability Reporting Directive (CSRD), which requires detailed climate-related reporting. 

In short, for many, ESG is no longer optional.

The environmental aspect of ESG is about a company’s impact on the planet. Key environmental factors include:

• Climate change: Companies are expected to measure and cut greenhouse gas emissions, invest in renewable energy, and adapt to climate risks.
• Resource depletion: Using resources efficiently, cutting waste, and using circular economy models are vital for mitigating resource depletion.
• Pollution: Minimising air, water, and land pollution with cleaner technologies is key.

Companies can improve their environmental impact by:

• Setting emissions reduction targets in line with the Paris Agreement.
• Investing in renewable energy sources like solar and wind power.
• Improving energy efficiency to reduce consumption.
• Promoting sustainable supply chains by working with environmentally responsible suppliers.
• Reducing waste and encouraging circularity.

The social side of ESG focuses on a company’s relationships with its stakeholders. Key social aspects include:

• Labour standards: Upholding fair labour practices, including safe working conditions, fair pay, and progression opportunities.
• Human rights: Respecting human rights throughout operations and supply chains, avoiding child labour, forced labour, and discrimination.
• Diversity and inclusion: Promoting a diverse and inclusive workforce where all staff are valued.
• Community engagement: Supporting local projects and contributing to community well-being.

Companies can boost their social responsibility by:

• Implementing fair labour practices providing training and development opportunities.
• Carrying out human rights due diligence to spot and address potential risks.
• Implementing policies that promote diversity and inclusion.
• Getting involved in philanthropy, volunteering, and partnerships to support local communities.

The governance side of ESG assesses a company’s leadership and decision-making. Key governance factors include:

• Board structure: Having a diverse and independent board of directors.
• Executive pay: Aligning executive pay with the company’s long-term interests.
• Transparency: Transparent reporting and disclosures to give stakeholders accurate ESG performance data.
• Ethics: Having a strong code of ethics and encouraging ethical behaviour.
• Accountability: Companies must be accountable to stakeholders for their ESG performance.

Good governance ensures sound decision-making, promotes ethical behaviour and builds trust. This is vital for long-term sustainability.

ESG investing is at the heart of this entire topic. It means integrating environmental, social, and governance factors into investment decisions alongside financial considerations. 

Don’t forget that ESG’s primary function is to help investors align their work with sustainable values and make a positive global impact. Studies also suggest that ESG investing can provide competitive financial returns. ESG investing also helps reduce risks, such as the long-term impacts of climate change.

You can’t demonstrate success without reporting. So, it should be no surprise that ESG reporting is another crucial pillar. 

The main goal is thoroughly disclosing a company’s environmental, social, and governance performance, giving stakeholders insight into sustainability efforts, risks, and opportunities. The Global Reporting Initiative (GRI) framework helps create sustainability reports covering environmental, social, and economic factors, helping organisations understand their impacts. Increased stakeholder demand, regulatory needs, and the competitive edge of good ESG reporting are driving its growth. Major ESG reporting frameworks and standards include:

• The Global Reporting Initiative (GRI): The most used standards for sustainability reporting.
• The Sustainability Accounting Standards Board (SASB): Provides industry-specific standards, focusing on issues important for financial performance.
• Task Force on Climate-related Financial Disclosures (TCFD): A framework for disclosing climate-related risks and opportunities.

Implementing and reporting on ESG presents both hurdles and benefits for businesses.

• Challenges include the lack of standardised metrics, the complexity of data collection and management, integrating ESG into business strategy, the risk of greenwashing, and multiple reporting frameworks.
• Opportunities include a better reputation, reduced risk, improved financial performance, more innovation, and attracting and keeping talent. A comprehensive analysis shows the positive relationship between ESG systems and financial performance.

The future of ESG looks set to be increasingly important, and it comes down to a polarised political outlook. On the one hand is more backlash; on the other, more regulation. Either way, boards have a lot of thinking to do to ensure they keep stakeholders happy.

ESG is changing the business world. Companies prioritising sustainability, social responsibility, and good governance will be well-placed for long-term success. Integrating ESG enhances reputation, attracts investment, reduces risks, and creates value.

ESG: A comprehensive guide – The Corporate Governance Institute