DAVID BROOKS:

Working off U.N. and U.S. census data, Bill Frey, the indispensable University of Michigan demographer, projects that in the year 2050 the median age in the United States will be 35. The median age in Europe will be 52. The implications of that are enormous.

As we settle down to the Thanksgiving table in a few days, we might remind ourselves that whatever other problems grip our country, lack of vitality is not one of them. In fact, we may look back on the period beginning in the middle of the 1980’s as the Great Rejuvenation. American life has improved in almost every measurable way, and far from regressing toward the mean, the U.S. has become a more exceptional nation.

And for that, let us give thanks.