The answer would be : The counterculture
The counterculture era was the reaction to political conservatism of current establishment in that era ( back then , the united states propose a lot of wars that created social repression). In the 1960s, a lot of youth formed various groups to protest the Government conservatism
It was the first multicultural empire in history. It was also the first very large empire. Because of this the Empire had to develop ways of running effectively. Roads were built over great distances. Standardize currency. Localized governing systems (i.e. satrapies). It was also the first time Asian powers attempted to invade Europe.
They found fertile soil, which they used to grow a variety of crops.
They found the soil unusable, and they had to rely on fishing and hunting for food.
They discovered sandy soil, which they had to convert to grassland in order to grow crops.
They shared their knowledge of crop rotation with Native Americans in order to establish trade.
One major reason European countries engaged in imperialism in the late 19th century was to (4) obtain markets for their manufactured goods. They launched a new period of colonial expansion, thus discovering new markets.