What systems and events led to the outbreak of the first world what the fan in europe

the complex alliance systems that were in place at the time. Hungary declared war on Serbia. Russia had to back their ally up, and did Germany. (Russia and Serbia were allies). Then Geramny took the opportunity to finally invade france, and G.B. declared war on germany. the ottoman empire were also allied with germany and austrio hungary.

The assassination of Archduke Ferdinand from Austria-Hungary by Serbian's. He was assassinated because Serbia wanted more land (Imperialism)

relations between the soviet union and the united states were driven by a complex interplay of ideological, political, and economic factors, which led to shifts between cautious cooperation and often bitter superpower rivalry over the years. the distinct differences in the political systems of the two countries often prevented them from reaching a mutual understanding on key policy issues and even, as in the case of the cuban missile crisis, brought them to the brink of war.

the united states government was initially hostile to the soviet leaders for taking russia out of world war i and was opposed to a state ideologically based on communism. although the united states embarked on a famine relief program in the soviet union in the early 1920s and american businessmen established commercial ties there during the period of the new economic policy (1921–29), the two countries did not establish diplomatic relations until 1933. by that time, the totalitarian nature of joseph stalin's regime presented an insurmountable obstacle to friendly relations with the west. although world war ii brought the two countries into alliance, based on the common aim of defeating nazi germany, the soviet union's aggressive, antidemocratic policy toward eastern europe had created tensions even before the war ended.

c. free trade can lead to low pay for workers in poorer countries.