Across the country, in courts, classrooms, and the media, Americans are deeply divided over the use of race in admitting students to universities. Yet until now the debate over race and admissions has consisted mainly of clashing opinions, uninformed by hard evidence. This work, written by two of the country's most respected academic leaders, intends to change that. It brings a wealth of empirical evidence to bear on how race-sensitive admissions policies actually work and what effects they have on students of different races.;William G. Bowen, argue that we can pass an informed judgment on the wisdom of race-sensitive admissions only if we understand in detail the college careers and the subsequent lives of students - or, to use a metaphor they take from Mark Twain, if we learn the shape of the entire river. The heart of the book is thus an unprecedented study of the academic, employment, and personal histories of more than 45,000 students of all races who attended academically selective universities between the 1970s and the early 1990s.

This article was updated on June 29 at 4:09 p.m.In a historic decision, the Supreme Court severely limited, if not effectively ended, the use of affirmative action in college admissions on Thursday.

"This page outlines various key court cases that deal with racial issues from a legal standpoint. These sites offer an introduction and information about historic precedents and other data that also impact on viewpoints found in relation to decisions made within wider society."

Michelle Singletary has an honest conversation about affirmative action. And, we take your questions about voting this year, starting with a listener in California.