Time on the Cross: The Economics of American Negro Slavery

First published in 1974, Fogel and Engerman's groundbreaking book reexamined the economic foundations of American slavery, marking "the start of a new period of slavery scholarship and some searching revisions of a national tradition" (C. Vann Woodward, New York Review of Books).
In an Afterword added in 1989, the authors assess their findings in the light of recent scholarship and debate.