Take a read. Claus has a grim look at Russian demographics. Demography Matters has an older post as well. It looks grim. Very grim. Oh, and any posts by Ez Em Stirling you should ignore. SF author he may be, but 'tard he is. I used to like his books, but he came out as a seriously nutso bigot on SHWI (google up magic buttom Stirling muslims).