Corporate social investment (CSI) is an approach that measures social, environmental, and financial returns from business efforts to address societal problems. Unlike traditional corporate social responsibility, CSI is designed and planned as an investment that provides demonstrable returns to investors. CSI improves not just inputs but also outputs and outcomes across areas like employee engagement, media profile, customer trust, and market share gains. Studies show that businesses following stakeholder theory to balance needs of employees, communities, and the environment have significantly outperformed market indexes over 15 years. CSI aims to create a virtuous cycle where business investment in social improvements grows social and environmental benefits for all while also boosting financial performance.