Effective Altruism: Ten Global Problems is a collection of ten top episodes of the 80,000 Hours Podcast, designed to bring you up to speed on ten pressing issues the effective altruism community is working to solve. Here the host of the show — Rob Wiblin — briefly explains what effective...

Toby Ord is a famously good explainer of complex issues — a bit of a modern Carl Sagan character — so we thought this would be a perfect introduction to the problem of existential risks.