Why did American develop later than those in Eurasia?

1. Isolation: The Americas were geographically isolated from Eurasia and Africa by vast oceans. This isolation made it difficult for humans to migrate to the Americas and bring with them the agricultural technologies and cultural developments that had already emerged in other parts of the world.

2. Lack of large domesticable animals: Unlike Eurasia and Africa, the Americas lacked large domesticable animals that could be used for agriculture, transportation, and warfare. This limited the development of complex societies and the spread of agricultural practices.

3. North-south orientation: The Americas are oriented north to south. This meant that early civilizations had difficulty spreading their knowledge and culture from one end of the continent to the other.

4. Geographical barriers: The Americas have significant geographical barriers, including the Andes Mountains and dense jungles. These barriers made communication and trade between different regions difficult and slowed the spread of ideas and technologies.

Environmental factors

1. Harsh environments: Much of the Americas consisted of harsh environments, such as deserts, mountains, and dense jungles. These environments made it difficult for humans to survive and thrive, and they slowed the development of complex societies.

2. Lack of domesticable plants: While the Americas had a wealth of plant resources, few of them were suitable for domestication and agriculture. This meant that early Americans had to rely on hunting and gathering as their primary means of subsistence, which limited their ability to develop more advanced civilizations.

Cultural Factors

1. Cultural diversity: The Americas were home to a vast diversity of indigenous cultures and languages. This diversity made it difficult for any single culture to dominate and spread its influence throughout the continent.

2. Lack of centralized authority: There was no centralized political authority in the Americas until the arrival of Europeans. This lack of political unity made it difficult for societies to cooperate and collaborate on large-scale projects, such as building cities or developing complex agricultural systems.

3. Technological Limitations: The indigenous people of the Americas had limited access to advanced technologies such as the wheel, the plow, and metallurgy. The absence of these crucial technologies hindered the development of complex societies and agriculture.

Additional Factors

1. Disease exchange: The arrival of Europeans in the Americas led to a devastating exchange of diseases between the two continents. This exchange decimated the indigenous populations and disrupted their societies, further slowing the development of complex civilizations.

2. Colonialism: European colonization of the Americas had a profound impact on the development of the continent. The imposition of European political, economic, and social systems disrupted indigenous societies and hindered their development.