How did the failure of the league of nations to prevent world war ii affect the formation of the united nations?
the us, the uk, the ussr, and china did not think the united nations would be successful, so they refused to join.
the us, the uk, the ussr, and china were very determined to create an effective organization that would not fail.
the us, the uk, the ussr, and china were afraid to give the united nations too much power and hindered the organization.
the us, the uk, the ussr, and china had not belonged to the league of nations, and therefore had no interest in the united nations.

This answer would be c

They made a checks and balance system to equal power within the branches. the "check" meant that one branch would watch one branch and "balance" them if they were too powerful. if you want more info on this, i would just google checks and balance system.

It me to understand the world and my place in it. for example, (and i know i’m using the terminology ‘historical perspective’ loosely here; some of my examples may be better termed an ‘evolutionary perspective’) knowing that all humans can trace their ancestry back to a common ancestor who lived in southern ethiopia ~200,000 years ago makes me feel connected to everyone on the planet. knowing that some of our ancestors left africa about 70,000 years ago and interbred with more archaic hominin species in europe and elsewhere, me to see the stupidity of white supremacist ‘purity of the race’ themes. seeing how religion was used to enslave people, and how callously lives were thrown away by those in power in the world wars of the past century makes me feel extremely fortunate to be living in the modern era. and, perhaps most importantly is that this knowledge makes me for the sacrifices our ancestors made to get us to this point, and determined to do my part to make the world a better place for the next generation.