Why was the system of checks and balances included in the constitution?

to prevent one branch of the government from becoming too powerful
to keep the president of the united states from vetoing legislation
to slow down the process of government so it doesn't move too fast

each played a major role in ending the cold war.

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.