Well, I think I still need more a father (mine is remarried and not with me) than children. The world is overpopulated, and Mankind will not disappear for some people not having children. However Torah says that Jews and Noahides must have children. I think that the singles or married who voluntarily choose not to have children should be excluded from important positions like politics. How can you handle a nation, if you are not capable of managing a familly???