- Geography: The United States is a large country with a diverse landscape, which has had a significant impact on its history. For example, the country's vast size has made it difficult to govern, while its natural resources have attracted settlers and immigrants from all over the world.
- Native American cultures: The indigenous peoples of the Americas had a profound impact on the development of the United States. Their knowledge of the land and its resources was essential to the survival of early European settlers, and their cultural traditions continue to influence American society today.
- European colonization: The United States was founded by European colonists, who brought with them their own institutions, languages, and religious beliefs. The legacy of colonialism can still be seen in many aspects of American society, such as the structure of the government, the education system, and the racial composition of the population.
- African slavery: African slavery was a central part of the American economy and society for over 200 years. The legacy of slavery continues to shape race relations in the United States to this day.
- Immigration: The United States has been a destination for immigrants from all over the world for centuries. These immigrants have helped to shape the culture and economy of the United States, and they continue to contribute to its diversity and dynamism.
- Warfare: The United States has been involved in numerous wars throughout its history, both domestic and foreign. These conflicts have had a significant impact on the country's politics, economy, and society.
- Ideology: American history has been profoundly shaped by its founding ideals of liberty, equality, and democracy. These ideals have inspired generations of people to resist tyranny and work toward a more just and perfect society.
-Technology:** American history also closely ties with the emergence and growth of innovation throughout the generations which greatly affected people's ways of living.