which belief caused serb nationalist to come into conflict with austia-hungary in the years leading up to world war 1

Explain what the following quote means: “if men are naturally in a state of war, why do they always carry arms and why do they have keys to lock their doors? ”

After the success of the sputnik launch, the united states feared that they would never be able to launch their own satellite, the ussr had used technology developed by the united states, the soviets had superior nuclear capabilities, that any future us satellites would not be as successful.

Which was a major effect of the canal craze of the early 19th century