How did human history in North America during the period described in the Prologue differ from the events of Asia, Eurasia, and Europe? Be specific.

The Human History in North America differ from the events in Asia, Eurasia and Europe during the centuries before the colonization because of the influence of factors like Geography, Climate, Crops and Game Animals available.
The major events that we are going to focus our comments on in this paper are the Clovis era and the evolution of the Sahara Desert. These two major issues in human history chapped the form of the world in the way that we know it now days.
Geography in the part of the globe that we know currently as North America, specifically in the area the Clovis Culture was developed, played an important role in the success of this culture. It is known that the first human came to America crossing over the land bridge of the Bering Straight. This is a major event in human history, and it was possible only due to geography with a help of the climate in the region back then.
The climate in the North American region was cold. We can find at the museums a lot of evidence of Ice-age giant animals that roamed the region long before the colonial era. Some historians and scientists argue about the reason why the big mammals disappeared from the region, but one of the theories appoint to an “over hunting” situation. This all means that the area was very good for hunting, leaving no need to plant or cultivate but just the basic vegetables and grains.
The great plains of North America were a huge hunting area, full of game animals and facilitating the hunting of big mammals. Game animals in so much abundance leave no need for alternate sources of food, and this was one the reasons why the agriculture was not successful among the early human in the continent. It is not only until 6,000 to 7,000 years ago when the humans start to domesticate the corn in the form of maize. With the big mammals disappearing rapidly, the agriculture turned to be more important in the early society. This put some pressure in the humans and more crops start to be cultivated in order to sustain growing demands for food.
We can find plenty of evidence that the early humans in the American continent domesticated maize getting it shaped to the actual crop that we know now days. This was a very important step in the society evolution because the families started to be more sedentary. The crops allowed reduce the need of enormous quantities of game animals to feed the families, allowing people to focus time and energy in other activities different from just hunting and gathering.
All these events in the American continent and the expansion of the Sahara Desert in Africa made possible the changes in the way that the evolved from 4,000 B.C.E.
In Europe and Asia, the game animals were different from the ones present in the American continent. Smaller and scarce hunting made the humans invest more time and efforts in developing an efficient agricultural system that was the corner stone of the society. This situation influenced the human development as an individual and as a member of a society as well. Signs of early science and arts in the Europe and Asia territories make clear the difference between the Hunting Base Society (early Americans) and the more sedentary versatile early European society.

How were these differences important to the international state of affairs in 1450?

One of the important changes that occurred was the Neolithic revolution. It is transition from hunting and gathering to farming that had come to Central America. I believed that the Neolithic revolution was caused by an event that started way back on the Clovis era where in big mammals are hunted freely and unlimitedly. With so much game, the hunters slaughtered them almost at will, or stampeded them over cliffs. Without thinking about what could happen in the future, Indians back then hunt and kill animals more than they needed. With these actions the big mammals were gone. Most of the large mammals of North America had become extinct, including the mammoths, mastodons, saber-toothed cats, giant beavers, bears, horses and camels. And with all the big mammals gone, Archaic Indians adapted to particular habitats. They learned to hunt small animals like rabbits, beavers, caribou, elk and deer that previously not been worth the bother.
The solution that I think that the Indians came up with is that they focused on a different field of food source, since the game is lesser and harder to get they use their spare time on cultivating plants. Living from a nomadic way of hunting to agricultural way of living is one of the biggest and maybe hardest changes that these people had faced. But if the Neolithic revolution had made but fitful progress north of Mexico, its advance through Eurasia and Africa was nearly complete.
While few large mammals in the Americas survived the Clovis era, the ancient people of Eurasia learned how to domesticate horses, pigs, cows, goats, sheep and oxen. In addition to protein-rich meat, cows and goats provided milk and dairy products such as cheese that could be stored for winter; horses and oxen were used to drag trees and boulders from fields, pulled ploughs through tough sod, and contributed manure for fertilizer. In short, Eurasia used their resources wisely and did not abuse them; they explored all possible uses and valued its food source.
As time passed population around the world increased. By 1500 population pressure was acute. When harvest is poor or grain shipment failed to arrive in towns, hunger riots destabilized the political order. Population growth exceeded available food sources; poverty undermined political order; and war loomed larger and more ominous. Equally plainly, the people of North America had failed to solve basic social problems: Nomadic Indians who practiced a hunting-gathering lifestyle were vulnerable to starvation as well as to encroachments by the more numerous people of the corn-farming tribes. Farming Indians, on the other hand, found it difficult to sustain even small urban communities over a long period. In the absence of writing systems and larger “national” political organizations, few could join in broad enterprises; none possessed military technologies comparable to the Europeans. And the people of the Americas lacked the immunity from infectious diseases that so many Europeans had acquired.