That graph is all about women and children, since women and children comprise the majority of what is considered "the poor". The closer the top the country is on that graph, the less likely they are to get married, and to have a nuclear family. One reason for this is because the government assumes the financial role of "father" to the children. Also, the closer to the top of that list the country is, the lower their birthrates are. And finally, the closer to the top the country is on that list, the weaker their military is.
Not making any value judgments here (I may do that later), just stating the facts. You can verify them all yourself. Make of it what you want.