Soldato
The blame lies with divorces, family breakups, many sexual partners etc in western societes aswell as the emphasis on women being part of workforce. If husband and wife married for life like it is generally the case in eastern societies with emphasis on families then you would see european people having stable families with 2-4children easily. Their population will grow more and have a more stable family background as opposed to the thrash which we see on eastenders etc which I don't know how far it portrays the truth especially in british society.