countries forming alliances with each other and the countryman experience sentiments like nationalism should have benefited the world. how both of these turned out to be dangerous before and during WW1, instead

sense of self-interest

i would say the executive branch is because the executive branch is in charge of enforcing the laws and judicial branch is in charge of enforcing but the executive branch is most responsible for it all so i would have to say the executive branch.

the policy of appeasement influenced the beginning of ww2 because hitler gave the other countrys chocies but after they choose to try and appease hitler to not invade their country but he still invaded them.