Will XBOX 360 games also work on XBOX ONE?

I want to buy an XBOX ONE and some family games.

Do XBOX 360 games also run on the ONE?

There are many Xbox 360 games that also run on the One, you have to google yourself to see if yours work specifically.

Yes, almost all of them do.

Yes, almost all Xbox 360 games can also be played on the Xbox One.

In turn, almost all Xbox One games can be played on the Xbox Series.

This is the great Xbox ecosystem:-).