John Mackey, co-founder of Whole Foods Market, is one of the most consequential American entrepreneurs of our time.

Whole Foods began in 1980 as a small hippie health food store in Austin, Texas. Under Mackey’s leadership, it grew into the largest organic foods supermarket chain in the United States, selling to Amazon in 2017 for nearly $14 billion. It’s not an exaggeration to say that the company revolutionized the food industry, mainstreaming health-consciousness for a mass market.

Despite the company’s crunchy progressive brand, Mackey is a staunch capitalist and a steadfast defender of free markets. He popularized the term “conscious capitalism,” which marries capitalism and social responsibility, and and emphasizesinges the role of businesses in creating a sustainable and ethical impact on society at large.