World Series Baseball

I've been watching ESPN, Houston and Chicago, and I don't get it!

How is "World Series" defined?

Is the whole world of baseball defined as The United States of America or am I missing something?

I thought the Japanese and Cubans were pertty good.

Can someone me help here?

And how about the Chicago "White Sox". Does "sox" translate into "socks". If so then why do they play in "Black Sox"?

Looks like beards and spitting are "In" too.