By Andreas Kluth / Bloomberg Opinion

It’s not easy being female. But it’s often no picnic being male either. The world is changing faster than ever and, with it, so are notions of masculinity. Many men are feeling unmoored, for better or worse.

If you happen to be James Bond, you take this flux in stride and effortlessly turn — via a few intermediary incarnations — from the Sean Connery version of manhood into the more vulnerable and complex Daniel Craig variety. But how many real-life men have an inner 007 to channel?

The reality for many of those who aren’t necessarily alpha males is bleaker. The U.S., for example, just counted record numbers of deaths from drug overdoses; more than 100,000 in one year and roughly double the number in 2015. And about 70 percent of those who died were men.

In China, the government worries about a “masculinity crisis,” as the nation’s boys allegedly become effeminate, whatever that might mean nowadays. Educators are pondering ways of strengthening the “yang spirit”; as in the masculine-ish yang that complements the more feminine yin force in Taoism.

Some experts in Germany use the exact same phrase — a “crisis of masculinity” — to describe the situation of men in what used to be communist East Germany. For decades after reunification in 1990, eastern women moved west or married western men, leaving many of the region’s males single, frustrated and alienated.

Reunification and its discontents may be a unique situation, but it appears that there’s something more general about modernity that can undermine and threaten manhood. Consider, for example, how one particular vector of change is slamming into masculinity: the automation of manufacturing with robots.

In general, I think of robots as a boon. They make production more efficient and, therefore, all of us better off. But even good things aren’t usually good for everybody. With automation, the losers are the blue-collar manufacturing workers who used to do what the robots now take care of. And those workers are overwhelmingly men. That’s not me throwing stereotypes around; that’s hard statistics.

By contrast, jobs in the service sector, and especially those where “people skills” are prized, aren’t threatened by robots at all, at least not yet. And here women appear to have a statistical edge. In economies where robots are used a lot, blue-collar men therefore find it harder on average to keep or find good employment, whereas women on balance fare better.

This bifurcation in prospects for men and women translates into a shrinkage in the wage gap that traditionally favored men. In general, that’s a good thing, of course, as it leads to fair rewards; equal pay for equal work. But a vanishing wage gap also has side effects, as the late Gary Becker, a Nobel laureate in economics, famously explained.

In “A Theory of Marriage,” published in 1973, he introduced the notion that a shrinking male-female wage gap reduces the value of wedlock to women. Back when the lads made a killing and the lasses made a pittance, it made sense — economically, at least — to “specialize” within a household consisting of a working husband and a wife, and maybe children. Once women earn better wages, however, they no longer gain much from tying themselves to men, at least not in the same way.

The consequence of Becker’s logic should be an observable bear market in the marriage value of men, leading to less matrimony and fewer births in wedlock (though not necessarily fewer births overall). And so it appears. The coal country of Appalachia, for example, had a boom in the 1970s and a bust in the 1980s. As predicted, marriage rates and births in wedlock increased in the 1970s when (largely male) coal miners did well, then decreased in the 1980s when they struggled.

Enter Massimo Anelli, Osea Giuntella, and Luca Stella; researchers, respectively, at Bocconi University in Milan, the University of Pittsburgh and the Free University of Berlin. Using data from the U.S., they found that the more robotics transformed manufacturing in a given region, the smaller the income gaps between women and men. Marriages declined, divorce and cohabitation increased. Marital fertility also decreased, while out-of-wedlock births increased.

There’s nothing inherently good or bad about such correlations and trends. They just mean that societies are changing. But change is hard for people. And men, as they lose the roles their fathers and grandfathers might have considered self-evidently masculine, appear to be at particular risk.

One is that they fall prey to demagogues on the far right. In eastern Germany, male frustration is certainly one explanation for the rise of the Alternative for Germany, a populist party. In the U.S., regions with lots of robots were among those where Trumpism is big.

A related phenomenon is the misogynistic “incel” movement of men who label themselves as “involuntary celibates.” They often radicalize themselves online, blame women for their low status and spread conspiracy theories. In California, Florida and Toronto, incels have gone on killing sprees.

The best advice to individual men would seem to be to welcome the evolution of masculinity as a liberation; let’s stop worrying about it and flow with it. But, for communities and societies, the flux in manhood bears dangers. This Chinese talk of strengthening the yang spirit seems corny and amiss. Even so, it bears remembering that yin and yang must be in balance to have harmony.

Andreas Kluth is a columnist for Bloomberg Opinion. He was previously editor in chief of Handelsblatt Global and a writer for the Economist. He’s the author of “Hannibal and Me.”