Liberalism has no future. This article in USA Today explains why:
Childlessness and small families are increasingly the norm today among progressive secularists. As a consequence, an increasing share of all children born into the world are descended from a share of the population whose conservative values have led them to raise large families.
Today, fertility correlates strongly with a wide range of political, cultural and religious attitudes. In the USA, for example, 47% of people who attend church weekly say their ideal family size is three or more children. By contrast, 27% of those who seldom attend church want that many kids.
In Utah, where more than two-thirds of residents are members of The Church of Jesus Christ of Latter-day Saints, 92 children are born each year for every 1,000 women, the highest fertility rate in the nation. By contrast Vermont - the first to embrace gay unions - has the nation's lowest rate, producing 51 children per 1,000 women.
Similarly, in Europe today, the people least likely to have children are those most likely to hold progressive views of the world. For instance, do you distrust the army and other institutions and are you prone to demonstrate against them? Then, according to polling data assembled by demographers Ron Lesthaeghe and Johan Surkyn, you are less likely to be married and have kids or ever to get married and have kids. Do you find soft drugs, homosexuality and euthanasia acceptable? Do you seldom, if ever, attend church? Europeans who answer affirmatively to such questions are far more likely to live alone or be in childless, cohabiting unions than are those who answer negatively.
This correlation between secularism, individualism and low fertility portends a vast change in modern societies. In the USA, for example, nearly 20% of women born in the late 1950s are reaching the end of their reproductive lives without having children. The greatly expanded childless segment of contemporary society, whose members are drawn disproportionately from the feminist and countercultural movements of the 1960s and '70s, will leave no genetic legacy. Nor will their emotional or psychological influence on the next generation compare with that of people who did raise children.
Meanwhile, single-child families are prone to extinction. A single child replaces one of his or her parents, but not both. Consequently, a segment of society in which single-child families are the norm will decline in population by at least 50% per generation and quite quickly disappear. In the USA, the 17.4% of baby boomer women who had one child account for a mere 9.2% of kids produced by their generation. But among children of the baby boom, nearly a quarter descend from the mere 10% of baby boomer women who had four or more kids.
This dynamic helps explain the gradual drift of American culture toward religious fundamentalism and social conservatism. Among states that voted for President Bush in 2004, the average fertility rate is more than 11% higher than the rate of states for Sen. John Kerry.
So, liberal families are no more fecund than liberal ideas. How fitting. There's much more interesting information on the consequences of the lack of fruitfulness among liberals at the link.