Extinctions. Zika virus. The migrant crisis. Climate change. ISIS. The economy. What we read in the news almost every day now seems like a string of unrelated problems, but they’re not. In fact they are intimately intertwined and feed back on one other to poise humanity on the brink of a societally dangerous tipping point we’d hit in just a decade or two—if we don’t start doing things differently. This lecture will point out how we know that planetary tipping points happen (though rarely), why we seem on the brink of one, and what each of us can do to help the world tip in a direction that is good for people and the planet, rather than one that will harm both. Read more.