Few people know more about the Taliban than journalist and author Ahmed Rashid, who wrote the book on the group — literally.

In the months after 9/11, his critically acclaimed 2000 study Taliban: Militant Islam, Oil & Fundamentalism in Central Asia became a go-to reference as the US geared up to invade Afghanistan and knock the militant group from power.

Now, twenty years later, with the US out of Afghanistan and the Taliban back in charge, Ian Bremmer sat down with Rashid to learn more about the Taliban today in a GZERO World interview.

How much has the group changed since the days of soccer-stadium executions, television bans, and blowing up world heritage sites? How should the rest of the world deal with them?