Why did the u. s. and ussr engage in an arms race with nuclear weapons?

Reformers worked to change schools by making them more:

Which of the following explains why scarcity is a basic fact of life a. demand will always be greater than supply b. technology has not advanced far enough yet c. there will always be too many people on earth d. people cannot make good allocation decisions

What was a result of the peloponnesian war? a. it resulted in teh destruction of the peloponnesian league. b. it resulted in an alliance between athens and persia. c. it started the golden age of athens under pericles. d. it ended the athenian domination of the greek world.