The Post left an unfair impression in its article about the aggressively money-oriented ambitions of today's young Americans {"Hopes of a Gilded Age," front page, June 14}.

As president of The Population Institute, I spend the better part of each academic year traveling to college campuses and speaking with students about the need to confront poverty, misery and hopelessness spawned in the Third World by the pressures of rapid population growth.

Since Jan. 15, I have visited 33 college campuses and fully 3,300 young people have come forward and volunteered to work toward a solution to a problem that for most Americans seems abstract, distant and removed.

The Post's article about youthful greed and social apathy came on the very day that 10 recent college graduates arrived at The Population Institute to begin six-month stints with long hours and subsistence wages, working on a humanitarian cause.

I do not dispute the existence of teen-agers who have no higher ambition than to amass cash and stock certificates. I have occasionally met some of these young people, and I have found the experience as disappointing as did the observers interviewed by The Post. But I have found them to be in the minority and I believe it is most unfair to leave an entire generation with the ugly brand of vacuous greed. WERNER FORNOS Washington