Lenin was a Marxist, as were his successors. He had a vision of making the Soviet Union a country where everyone will be equal, earning the same amount of money, everything will be available to everyone, the country to be self-sustainable. While this may seem as a nice idea, in practice in turned the total opposite. The Soviet Union became one huge concentration camp where around 30 million people lost their lives because they had another political opinion, belong to certain ethnic group, and were people that had it better and succeeded in life. The people were poor, often suffering from malnutrition because of the misjudged planning of the high officials. The economy was not in good condition and was developing very slowly. The country was ruled by a dictator that used violence in order to sort all the problems.
The Homestead Act was attractive to settlers, because it gave land to anyone over 21, or head of family (even women and former slaves), who applied for land, this land for a very cheap price (or no price at all) and through this it enabled easy settlement. The farmers had to then cultivate the land for a period of time, and if they did not abandon it and tended to it properly, it became their property.
The American Constitution was heavily based on the idea of democracy and a perfect world where people would have free speech and rights. The idea of democracy was derived from the earliest form of democracy, (direct) Roman democracy. As many people know, the Romans adopted a lot of Greek culture and ideas from taking over Ancient Greece in the times of the Roman Empire. This is what I think is how the American political process was formed from the basic standards of Greek civilizations.
C.Globalization cuz thats what our economic world of trades is facing the most.