Is there a good estimate (books or supplementary canon material) of how many Men there were on Arda at the time of the War of the Ring? I am OK with an answer either for Arda as a whole, or at least for the principal countries involved (Gondor, Rohan, Mordor, Easterlings).
NOTE: Whilst I've read the books and done some preliminary research, I can't pin down a figure for the number of men in Arda (or any of the other regions). To be honest, I'm just curious, but I think it might help me phrase another question