How can we help humans thrive trillions of years from now? This philosopher has a plan

Philosopher William MacAskill coined the term "longtermism" to convey the idea that humans have a moral responsibility to protect the future of humanity, prevent it from going extinct and create a better future for many generations to come. He outlines this concept in his new book, What We Owe the Future. (Matt Crockett)

Let's say you're hiking, and you drop a piece of glass on the trail. Eventually someone will walk along the trail and might cut themselves on the glass.

You'd be really sorry to hear if it happens to someone you know in a week. But what if the victim lived thousands, even millions of years in the future?