In October, in his keynote address to the 2014 National Bioneers Conference in San Rafael, California, he told the assembled crowd, “In the light of a collapsing world, what better time to be born than now? Because this generation gets to rewrite history, gets to leave our mark on this earth.… We will be known as the generation, as the people on the planet, that brought forth a healthy, just, sustainable world for every generation to come. … We are the generation of change.”In December, HBO will debut the music video “Be the Change,” by Martinez’ hip-hop group, Voice of Youth.