Robert Kinloch "Bob" Massie IV is an American activist, author, clergyman and early pioneer in the fields of corporate accountability, finance, sustainability, and climate change. He has created or led several organizations, including Ceres, the Global Reporting Initiative, the Investor Network on Climate Risk, the New Economy Coalition and the Sustainable Solutions Lab. His early activism centered on opposition to South Africa's apartheid regime, writing about the relationship between the U.S. and South Africa in the apartheid era.