The document outlines the three phases of corporate social responsibility (CSR): Phase 1 from 1960-1990 when CSR began; Phase 2 from 1990-2000 when CSR initiation took place; and Phase 3 from 2000 onward as the post-CSR phase. It traces the origins and evolution of CSR concepts from the 1900s to present day, including early works, increased environmental awareness in the 1960s, mandatory social reporting in the 1970s, and influential theories from Friedman and Freeman.