If you are interested in this topic, the book to read isThe Horse The Wheel And Language: How Bronze-Age Riders From The Eurasian Steppes Shaped The Modern Worldby David W. Anthony.He is the world's leading expert on the domestication of the horse and the development of the chariot.He engaged with Victor H. Mair, an expert on the opening of the Eurasian steppes about 2000 BC.The book is online at the Internet Archive. I edited the text down to make it more compact. But the words are David Anthony's, not mine. I added the page numbers and emphasis (bold & font size).After you have read this, I would be interested in your thoughts. But please read first, write afterwards.Peterhttp://mailstar.net/Anthony-Horse-Wheel.doc