The Rev. Al Sharpton is calling for a high-profile community summit to address black-on-black violence after Harlem was rocked by a wave of shootings over Memorial Day.

"Last year alone, nearly one black child a day under the age of 17 was shot and killed in New York City. Shot mostly by other black city residents," Sharpton said.

He said three critical areas need to be addressed: improving partnerships between the police and the community, "better dialogue between all of us with our youth" and new jobs.

Why wasn't this an issue in the presidential campaign, in which many promises of change, racial reconciliation, etc. were made?

It would require either white people to intervene in black people's affairs, and arrest more young black men, which black people as a demographic despise (with good reason), or for black people to admit a large problem publically at a time when they feel under assault from others for reasons of race.

In the meantime, the deaths -- mostly of children -- continue.

It's time to admit pluralism doesn't work, and we need to set up local communities on the basis of heritage, culture, values, and language -- and possibly variants of those, where not all are in line. Pluralism isn't working. Throughout history, we have no examples of it working. Just how dumb do we have to be to keep trying?