Why didn't Judaism become an universalistic religion?

[Avis Glauca]

Since Judaism is based on a Divine Revelation, why didn't the Prophets starting with Abraham and Moses preach to all other nations of the Earth. Does it mean outsiders are damned to hell?

[searchinmyroots]

Avis,

What were the instructions given by G-d?

Was it to preach to other nations or to obey His commands, set an example and educate/teach others?

Why would you think "outsiders are damned to hell"?

Especially since hell doesn't exist in Judaism, at least how the other nations believe it to be.

[Jason]

Why starting with Abraham and Moses? Why not all the way back to Adam?