Overall, why have the Americas been much more peaceful in last 200 years than Eurasia/Africa?

[Blue3]

Overall, why have the Americas been much more peaceful in last 200 years than Eurasia/Africa?

The United States is the biggest disturber of the peace, with the War of 1812, the Indian Wars, the Mexican-American war, the Spanish-American war, failed coup in Cuba, other coups in other Latin American country (though no true war since the Spanish-American).

There have been internal conflicts - those mentioned coups, civil war in US, civil war in Mexico, civil war in Colombia, etc.

But there's nothing close to, say, the French-British rivalry of the late medieval and early modern times, the French-Germany rivalry of later times, the India-Pakistan rivalry of current times, outright annexation/division of nations like what Russia and Germany did to Poland, or situations like the Korean War or the partition of India or the invasion of Afghanistan, or the equivalent of the world wars' effects in the "old world" happening in the "new world."

Overall, the Americas have been much more peaceful, especially in the last 200 years (though no paradise). Yet humans are still human.

What explains the difference?

[Blue3]

compared to Eurasia/Africa...

Read the first post.

https://en.wikipedia.org/wiki/List_of_wars_involving_Mexico
https://en.wikipedia.org/wiki/List_of_wars_involving_Brazil
https://en.wikipedia.org/wiki/List_of_wars_involving_Colombia
https://en.wikipedia.org/wiki/List_of_wars_involving_Cuba
https://en.wikipedia.org/wiki/List_of_wars_involving_the_United_States
https://en.wikipedia.org/wiki/List_of_wars_involving_Peru

That looks like a lot of wars to me.

Read the first post.

[Blue3]

Because the United States dominates the entire continent by sheer economic and military size, and controlls directly or indirectly almost all of it.

Now if Mexico, Brazil, Argentina or Colombia become strong enough to challenge the United States, that would change.

Not really?

All of the countries are Hispanic and culture is not THAT different between themselves. Why would they fight?

Only reason I can think of are border disputes but those are pretty insignificant. The areas larger in size that are contested we already had or are about to see conflicts involving them: Malvinas Islands and Guyana Esequiba.

Literally every other area contested is pretty irrelevant in size to justify an outright conflict. Maybe the Suriname/Guyana contested area is the only other exception.

In the past 200 years there have been the following inter-latin conflicts:

Peru vs Equador
Chile vs Bolivia
Chile vs Argentina
Paraguay vs everyone
Argentina vs Brazil
Guatemala vs El Salvador
Haiti vs Dominican Republic
Dominican Republic vs Venezuela

Very few, mostly small-scale, and not for a while.