By the time I was 40, I had a great track record of designing for other people – Giorgio Armani, Anne Klein, Perry Ellis, Paco Rabanne – and I joined Gap to head up their global design team in 2007. But then I started hearing stories from our denim factories: The rivers downstream were blue from all the dyes, and the fish and the water that these communities depended on were becoming contaminated. So I decided to do something about it: I committed to making sure that all the water leaving Gap’s denim factories would be cleaner than when it went in. We printed everything that we did for clean water on the garments – because I thought people cared and they should know. The initiative was a huge success. That was the first time I understood that if we could be smart about it, we could do good business that was also good for the environment.