what is the adventages of the wars?

Answer 1

It makes money for people who supply weapons.
It makes money for people who supply transportation for troops.
It gives the military clout to get more money.
It's keeps people from focusing on "smaller" issues, like the economy, education etc.
It can allow for land expansion.
It can be used as population control.
It can be used to scare smaller nations into staying in line.

I like peace so much better.