In 1517, the german priest began the protestant reformation by posting his ninety-five theses, which accused the catholic church of worldliness and corruption.

from the conditions of the working class in england by friedrich engels,the main idea is :

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.