There’s a lot of interesting data on Europe’s wave of refugees in the nonprofit Pew Research Center’s latest report. But here’s a piece of information that is not as much interesting as disturbing: Only 27 percent of those refugees are female. In every age group, from nearly every country of origin, women are greatly outnumbered.

And the difference is even more pronounced for immigrants from Africa, the Middle East and the Indian subcontinent. Gambia, Bangladesh and Pakistan, for example, sent virtually no women at all. Overall, refugee men outnumber refugee women nearly 2-to-1.

There are two scenarios that can unfold from this fact. The first is that destination countries simply end up with an imbalance between the number of men and women in their populations.

That would be a problem; even slightly out-of-whack gender demographics can have substantial social impacts. The refugees – already predisposed to experience isolation, disconnection and disaffection from their host society – will thus also bear the desperation of men who have little hope of forming a long-term relationship with a woman and starting a family. This is a recipe for disaster.

So why not allow additional women to emigrate from these men’s countries of origin? This would aggravate another set of problems.

Just last year, several of the more popular destinations for immigration saw their foreign population shares increase by more than 1 percentage point. (The United States has long been the world’s most popular destination for immigrants. For comparison, it saw a similar increase over 10 years, from 2005 to 2015.) To allow enough additional women to fix the gender imbalance would imply something like another half-percentage-point increase, over a very short period of time.

I am, as I have frequently noted in this column, a big fan of immigration. But cultures, particularly homogeneous cultures, do need some time to absorb and assimilate the migrant flows. Last year’s refugee wave strained both the political and social systems of many countries. Increasing it by half again, or a third again, in short order, might bring those systems to the breaking point.

Unfortunately, at this point there aren’t any good options left. The people are there; Europe cannot go back and demand a more gender-balanced migrant wave. It could deny the bulk of those applications and send most of those men back where they came from. But that’s unlikely; both European Union refugee policy and a lot of the political class are publicly committed to sheltering a lot of these people. It would be difficult indeed to suddenly backpedal on those commitments.

It would also be politically difficult to radically increase immigration (by women) as a response to the wave of immigration (by men). But a short-term political challenge is far preferable to a simmering societal meltdown.

— The Washington Post News Service

with Bloomberg News