What was the root of the idea in having a united nations?

there had always been a spirit of peace in europe.
earlier organizations had attempted to stop wars.
the americans had introduced plans for an international group of nations after world war i.
during world war ii, the idea was being planned for this assembly.

How did many americans respond to the labor strikes of 1919? a.) many felt the strikes were started by communists. b.) many were sympathetic to the demands of labor unions. c.) many thought the government should not intervene.

Which piece of legislation signed by lyndon johnson brought an end to barriers preventing minorities from participating in elections?

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?