The presidential election of the year 1856 in the United States was the Eighteenth quadrennial election for the post of President. It was a three-way election. In this election, James Buchanan of the Democratic party defeated the nominees of the Republican and the American Party, John C. Frémont and Millard Fillmore respectively. It was during this time that the party member of John C. Frémont used the slogan “Free soil, free speech, and Frémont.”
King John ruled England for almost two decades (1199-1216) and was well known as a heavy handed ruler. He would often wage unnecessary wars and burden his subjects with heavy taxes to pay for them. King John begrudgingly signed the Magna Carta because he needed the barons to fight his wars and collect his taxes.
I would say what was most important would be the adoption of agriculture. Humans no longer had to move around and spend their days solely focusing on finding food. Being able to settle down and make one's own food allowed humans to have free time, and create hierarchies and languages and art, creating societies and civilization.
