This chapter examines corporate social responsibility (CSR), ethics, and sustainability as integral to organizational behavior. It introduces CSR through the concept of the triple bottom line: economic, environmental, and social and explains how organizations balance profitability with broader societal impact. Two forms of sustainability are explored: environmental, focusing on resource conservation, and human, emphasizing employee well-being and social equity. The chapter presents both a business case and an ethical mandate for CSR, highlighting strategic alignment and organizational integrity. Ethical decision-making is addressed through frameworks such as values clarification, values orientation, and applied ethics. It contrasts the shareholder and stakeholder models, showing how expanding responsibility beyond shareholders supports long-term success and justice. Tools like the ombudsman and applied ethical tests provide structures for managing dilemmas in complex environments. Ultimately, the chapter emphasizes that CSR and sustainability require organizations to consider their broader impact and uphold integrity across environmental, social, and governance dimensions.