They were built by the Olmecs
Answer:
The Industrial Revolution was the beginning of capitalism as we know it today. The rise of capitalism changed societies entirely. Socialism and communism as demands for equality responded to these changes:
I) The world of work changed dramatically. City artisans and peasants saw their work being made by machines. They lost control of the production of those goods and started to work in fabrics owned by the bourgeoisie. Now they worked not for themselves but somebody else.
II) Changes started to happen faster. Because of new inventions in communication and transportation, it seemed time was ticking faster. This made workers fear for their survival amidst changes in the world of work.
III) Intensification and complexification of the economic system connected the world in violent ways that were noted by intellectuals of the time. Many men and women saw how the need for raw materials caused by the growth of the industry led to violence against peoples in other parts of the world and violence against workers through poor working conditions.
All these changes led to the rise of ways of thinking that saw capitalism as an intrinsically unjust and violent system and therefore demanded collective property of the means of production, i.e., fabrics, mines, etc.
Without U-2, Eisenhower would have met with Kruschev, and they might have come to a positive resolution on the issue of Cuba.
<span>With Cuba resolved, Eisenhower would not have needed to launch the Bay of Pigs invasion; Castro bringing in missiles was a direct reaction to the Bay of Pigs. No Bay of Pigs, no Cuban Missile Crisis. </span>
<span>Without the Cuban Missile Crisis, tensions between the US and USSR would have been reduced. Still there obviously, but reduced. It is likely Kennedy could have come to an agreement to significantly slow, if not end, the arms race with the USSR. </span>
<span>And if Cuba and nuclear weapons were on a lower simmer, the US might have been less likely to stay in Vietnam. Both Yarmolinsky and McNamara had misgivings as early as 1963 about Vietnam. If the Cold War was cooler, they might have been able to keep that fire out. </span>
<span>It's possible the Cold War could have taken an entirely different turn if not for one airplane being shot down.</span>
It was mainly the Seed Drill, helped farmers plant more quickly and efficiently.
Hope this helps!
Under the Han Dynasty, iron and salt were so important that Emperor Wudi established salt and iron monopolies and new taxes were decreed.