Keep my villagers from dying?

In an effort to give everyone an optimized playing experience, we do have mob caps on many of the mobs in the game, including villagers. You can have up to 10 villagers in 1 chunk (do F3 G to see chunk lines).

To make sure they do not die:

• No more than 10 per chunk

• Nametag all of them, even if they have locked in jobs