Cual es la definición de revolución?

Las revoluciones son los grandes momentos decisivos de la historia. Una revolución es un evento tumultuoso y transformador que intenta cambiar una nación, una región o una sociedad y, en algunos casos, incluso el mundo. Lo siento si esto no suena bien, estoy usando un traductor

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.

by 1880, germany had more rail lines than great britain and russia.