Here's a proposal, offered only partly in jest: no resident of the United States, whether born here or abroad, should get to be a citizen until age 18, at which time each such resident has to take a test.

From the right, you get demagogues shouting about brown-skinned anchor babies and clamoring to deport the undocumented. From the left, you get advocacy for the oppressed but otherwise, when it comes to national civic identity, mainly silence.

Imagine filling a college with the first 1,000 students to get perfect SATs. Whatever the racial composition of that class would be, the notion seems absurd because we know that college in America is supposed to be about creating citizens and leaders in a diverse nation.

The boomers will eventually have to accept that it is not possible to stay young forever or to stop aging. But it is possible by committing to show up for each others in community after community, to earn a measure of immortality.

In the end, a new Americanization movement can't just be about listing our privileges and immunities, which we catalog in our laws. It also has to be about reinforcing our duties, which we convey in our habits.

True patriots believe that freedom from responsibility is selfishness, freedom from sacrifice is cowardice, freedom from tolerance is prejudice, freedom from stewardship is exploitation, and freedom from compassion is cruelty.

If half-black Barack Obama had decided years ago to call himself white - which his genes certainly entitled him to do - his story would have carried very different meaning. If millions of part-black people had followed him into whiteness, then the N.A.A.C.P. would be in true crisis.