"Man has been the dominant sex since, well, the dawn of mankind. But for the first time in human history, that is changing—and with shocking speed. Cultural and economic changes always reinforce each other. And the global economy is evolving in a way that is eroding the historical preference for male children, worldwide.
Up to a point, the reasons behind this shift are obvious. As thinking and communicating have come to eclipse physical strength and stamina as the keys to economic success, those societies that take advantage of the talents of all their adults, not just half of them, have pulled away from the rest. And because geopolitics and global culture are, ultimately, Darwinian, other societies either follow suit or end up marginalized. In 2006, the Organization for Economic Cooperation and Development devised the Gender, Institutions and Development Database, which measures the economic and political power of women in 162 countries. With few exceptions, the greater the power of women, the greater the country’s economic success. Aid agencies have started to recognize this relationship and have pushed to institute political quotas in about 100 countries, essentially forcing women into power in an effort to improve those countries’ fortunes. In some war-torn states, women are stepping in as a sort of maternal rescue team. Liberia’s president, Ellen Johnson Sirleaf, portrayed her country as a sick child in need of her care during her campaign five years ago. Postgenocide Rwanda elected to heal itself by becoming the first country with a majority of women in parliament"