I see these changes in my friends and family and in the clients who come to me for marriage and family counseling.

These changes have taken place, for the most part, under the radar of our awareness but they are changing everything from how we deal with our health to who we elect as our next president.

A recent book review in the New York Times, from which the above picture was taken, begins:

“Throughout America’s history, the start of adult life for women — whatever else it might have been destined to include — had been typically marked by marriage,” Rebecca Traister writes in her new book, All the Single Ladies: Unmarried Women and the Rise of an Independent Nation. “Since the late 19th century, the median age of first marriage for women had fluctuated between 20 and 22. This had been the shape, pattern and definition of female life.”

But the times are changing, big time. An article in New York Magazine quotes Ms. Traister’s research:

“In 2009, the proportion of American women who were married dropped below 50 percent. In other words, for the first time in American history, single women (including those who were never married, widowed, divorced, or separated) outnumbered married women. Perhaps even more strikingly, the number of adults younger than 34 who had never married was up to 46 percent, rising 12 percentage points in less than a decade. For women under 30, the likelihood of being married has become astonishingly small: Today, only around 20 percent of Americans ages 18–29 are wed, compared to nearly 60 percent in 1960.”

“It is a radical upheaval, a national reckoning with massive social and political implications,” says Traister. “Across classes, and races, we are seeing a wholesale revision of what female life might entail. We are living through the invention of independent female adulthood as a norm, not an aberration, and the creation of an entirely new population: adult women who are no longer economically, socially, sexually, or reproductively dependent on or defined by the men they marry.”