Why would the soviet union be determined to avoid another conflict as devasting as ww2

They lost a significant amount of their population in WW2. Even though they won the war, the Soviets needed to be able to compete with the US, and major war woud devastate the Soviets.

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.

that would be the steamboat because none of the other things are forms of transportation