Answer and Explanation:
An ideal core that spread throughout America during the formation period was the desire for liberation from the British empire. This ideal was strongly influenced by The Sugar Act, which reduced the tariff paid by the British to the Americans for sugar production at absurd prices. This left the colonists very discouraged with the British government and made them realize that Britain was not in line with America's well-being and prosperity, preferring to exploit it and consume its production at very low prices. As a result, the Americans began to desire independence.
Steel was very much needed for many new industries, such as the railroads, toolmaking, construction. Also, many industries were needed to support the steel industry.
It's somewhat a matter of opinion, since many people have their favorites and it always looks good if you answer "Nelson Mandela". The truth is that after WW 2, the world got divided into a "Western" bloc under US leadership and a Communist bloc under the Soviet Union. The various US Presidents and Communist Party Secretaries all shaped the world in the Cold War era. A good candidate however is Soviet party leader Mikhail Gorbatchev, who practically single-handedly dismantled the old Soviet Union and thereby ended Communist rule over many eastern European countries. Americans tend to thank Ronald Reagan for that, but that is vastly overrating his actual influence on affairs. We Westerners like Gorbatchev for that, but in Russia he is generally seen as a weak leader and the man who 'sold out' Russia's global power and prestige and who was responsible for much of the following unrest until "thank God" Vladimir Putin took firm control and put Russia back on the map again.
The answer to this is c france hope this helps