The University of Texas at San Antonio has an Institute of Texan Cultures. They date the origin of chili to San Antonio in the early 19th century and found the earliest known recipe. It is beef, pork, chiles, onion, garlic, oregano, cumin. I usually make it that way. When I made it for my father in law, who is a decent old galoot, he said "this is not chili!" I said why, he said, where are the beans? These days I think most folks would expect chili to have beans. And tomatoes. But from a historical point of view, the beans and tomatoes seem to have come along later.