Tortillas are great, and I don't care who invented them.
But I think unleaven bread's been around for a while.
Tortillas are not an American invention. The corn tortilla has been around for thousands of years, mostly in Mexico. What we know as the taco today is served in various forms around the world and is considered an international food. Tostados served here are completely different from Tostados served in Mexico. In Mexico you get a flat hard corn tortilla shell with a very thin spread of refried beans, on piece of lettuce and maybe some lunch meat with a dab of some sort of white sauce. Here, you get that tortilla shell, lots of refried beans and a huge salad of lettuce and cheese.
What I find interesting is the refried beans have been around for thousands of years in Mexico AND in Africa. To me that proves that at some point, Africans traveled the world BEFORE Europeans. Also, there is a 6 foot rock carved with a face with negroid features that is thousands of years old right now at the Anthropological Museum in Mexico city.