In 1976, Amory Lovins wrote a 10,000-word essay in Foreign Affairs that proposed a radically different path for America's energy future. Rather than continuing to rely on nuclear and fossil fuels, Lovins suggested what he called the “soft energy path” – one of efficiency and renewable energy. It has been 40 years since Lovins, now Co-founder & Chief Scientist of the Rocky Mountain Institute, wrote his seminal article. CGEP Director Jason Bordoff sits down with Amory to discuss the evolution of hard and soft energy paths and the choices now facing the US and the world.