Should all couples have only one child?

Should all couples have one child only? This issue essentially exists in a number of families. One child only is an absolutely sensible and sagacious decision. In other words, if a family decides to have one child only, they probably would get a lot of benefits.

First of all, if a couple has only one child, the child obviously doesn¡¯t have to be jealous of his sisters or brothers on whatever things. Jealousy is a serious problem for a child. Can you imagine, i...