Do Conservatives Spawn Conservatives?

And, if so, if they're doing it faster than liberals, will we be extinct?

In a recent article in Foreign Policy, titled The Return of Patriarchy,Phillip Longman makes the following argument:

Across the globe, people are choosing to have fewer children or none at all. Governments are desperate to halt the trend, but their influence seems to stop at the bedroom door. Are some societies destined to become extinct? Hardly. It's more likely that conservatives will inherit the Earth. Like it or not, a growing proportion of the next generation will be born into families who believe that father knows best.

Here are some exerpts:
Throughout the broad sweep of human history, there are many examples of people, or classes of people, who chose to avoid the costs of parenthood. Indeed, falling fertility is a recurring tendency of human civilization. Why then did humans not become extinct long ago? The short answer is patriarchy.

Patriarchy does not simply mean that men rule. Indeed, it is a particular value system that not only requires men to marry but to marry a woman of proper station. It competes with many other male visions of the good life, and for that reason alone is prone to come in cycles. Yet before it degenerates, it is a cultural regime that serves to keep birthrates high among the affluent, while also maximizing parents' investments in their children. No advanced civilization has yet learned how to endure without it.
. . .
Meanwhile, single-child families are prone to extinction. A single child replaces one of his or her parents, but not both. Nor do single-child families contribute much to future population. The 17.4 percent of baby boomer women who had only one child account for a mere 7.8 percent of children born in the next generation. By contrast, nearly a quarter of the children of baby boomers descend from the mere 11 percent of baby boomer women who had four or more children. These circumstances are leading to the emergence of a new society whose members will disproportionately be descended from parents who rejected the social tendencies that once made childlessness and small families the norm. These values include an adherence to traditional, patriarchal religion, and a strong identification with one's own folk or nation.

This dynamic helps explain, for example, the gradual drift of American culture away from secular individualism and toward religious fundamentalism. Among states that voted for President George W. Bush in 2004, fertility rates are 12 percent higher than in states that voted for Sen. John Kerry. It may also help to explain the increasing popular resistance among rank-and-file Europeans to such crown jewels of secular liberalism as the European Union. It turns out that Europeans who are most likely to identify themselves as "world citizens" are also those least likely to have children.

Does this mean that today's enlightened but slow-breeding societies face extinction? Probably not, but only because they face a dramatic, demographically driven transformation of their cultures. As has happened many times before in history, it is a transformation that occurs as secular and libertarian elements in society fail to reproduce, and as people adhering to more traditional, patriarchal values inherit society by default.