This essay shares how my thinking evolved from evangelizing ‘sustainable investing’ for the world’s largest investment firm to decrying it as a dangerous placebo that harms the public interest. It’s not short. But this topic is critically important: it lies at the heart of how we reform capitalism to address important environmental and social challenges with concrete action. I challenge business leaders who have advocated the ideas I question below to offer a serious rebuttal. We’re running out of time: we can no longer afford to answer inconvenient truths with convenient fantasies.