Many experts argue that massive government mobilization on the scale of World War II deployment is needed to address the catastrophe of climate change. Such is the scope of the Green New Deal, a policy calling for 100 percent renewable energy by 2030, universal health care, living wages, and jobs guarantees. But some economists argue it could cost between $51 trillion and $93 trillion over 10 years. What is the connection between climate and social democracy the Green New Deal prioritizes? Are we crazy to think anything less substantial will prepare us for what’s ahead? Hear from both the person considered the architect of the policy and a Republican whose think tank has analyzed its costs and benefits.