I've spent this lunchtime looking over the web for various recipes and found hundreds of variations. From what I have gathered it falls into two dishes, the Texas chilli which is more a Spanish Mole with chunks of casseroled meat without beans and the more familiar Chilli Con Carne with ground meat and beans.
I think it is more likely that early versions were probably made with finely cut meat as opposed to ground, but nothing I have read supports that either way.
Actually, reading over all the recipes has been a worth while venture and given me some ideas to try my own recipe. But something that did come to my mind was to make a Sofrito to provide the base to my recipe. Using chopped onion, carrot and celery sweate d off with garlic then tomatoes cooked down with with fresh chilli and red wine, flavoured with bay leaf, corriander, cumin then seasoned. I'll probably try it with braising steak and add beans so it will be a mix of chilli con carne and a mole and will add a small amount of dark chocolate.
Any thoughts on this?