By Steve Winn, Kansas City Star Editorial Board

Sen. Barack Obama met the race issue head-on Tuesday, discussing it with intelligence, sensitivity and the historical perspective that the subject deserves.

On Tuesday the Democratic presidential candidate condemned the "incendiary language" of statements made by his former pastor, the Rev. Jeremiah Wright.

Yet Obama also recalled the nation's long struggle to confront and overcome racial injustice. And he made it clear that this struggle is not yet over -- a point that many on the right side of the political spectrum seem to have trouble grasping.

This national struggle has been particularly difficult in part because Founding Fathers like George Washington and Thomas Jefferson championed freedom for whites yet kept blacks in bondage.

Slavery was followed by many years of legalized discrimination and other inequities. As Obama pointed out, many of the problems still facing black communities and the nation as a whole can be traced to this shameful history.

The nation's founders were keenly aware of their shortcomings on race. Jefferson, for example, angonized over slavery. And they hoped that future generations would be able to improve upon the nation they had created.

Those hopes, as Obama noted on Tuesday, are embedded in the Constitution. Racial issues in this country, he said, were "a part of our union that we have yet to perfect."

He emphasized his belief that the nation could do a better job of healing racial divisions. One of his chief complaints about Rev. Wright, in fact, was his excessive pessimism on this point.

Obama's speech was a virtuoso performance that demonstrated why he has done so well in the current presidential campaign.

But it was also a valuable history lesson for a nation that sometimes doesn't remember quite as much about the past as it should.

Steve Winn is the deputy editorial page editor of The Kansas City Star.