JOHN P. HART is Director of Research & Collections, New York State Museum, Albany.JOHN EDWARD TERRELL is Director of the New Guinea Research Program and Curator of Anthropology at the Field Museum in Chicago.

• Foreword by Gary M. Feinman Introduction by John Edward Terrell and John P. Hart Adaptation by Todd Van Pool Biological Constraint by James Steele Cause by Michael J. O'Brien and R. Lee Lyman Classification by R. Lee Lyman and Michael J. O'Brien Complexity by John Kantner Culture by Paul Roscoe Descent by Scott MacEachern History by Sibel Barut Kusimba Individuals by Dean R. Snow Learning by Stephen J. Shennan Models by Bruce Winterhalder Natural Selection by Robert D. Leonard and George T. Jones Populations by Kevin Kelly

JOHN P. HART is Director of Research & Collections, New York State Museum, Albany.JOHN EDWARD TERRELL is Director of the New Guinea Research Program and Curator of Anthropology at the Field Museum in Chicago.

• Foreword by Gary M. Feinman Introduction by John Edward Terrell and John P. Hart Adaptation by Todd Van Pool Biological Constraint by James Steele Cause by Michael J. O'Brien and R. Lee Lyman Classification by R. Lee Lyman and Michael J. O'Brien Complexity by John Kantner Culture by Paul Roscoe Descent by Scott MacEachern History by Sibel Barut Kusimba Individuals by Dean R. Snow Learning by Stephen J. Shennan Models by Bruce Winterhalder Natural Selection by Robert D. Leonard and George T. Jones Populations by Kevin Kelly

JOHN P. HART is Director of Research & Collections, New York State Museum, Albany.JOHN EDWARD TERRELL is Director of the New Guinea Research Program and Curator of Anthropology at the Field Museum in Chicago.

• Foreword by Gary M. Feinman Introduction by John Edward Terrell and John P. Hart Adaptation by Todd Van Pool Biological Constraint by James Steele Cause by Michael J. O'Brien and R. Lee Lyman Classification by R. Lee Lyman and Michael J. O'Brien Complexity by John Kantner Culture by Paul Roscoe Descent by Scott MacEachern History by Sibel Barut Kusimba Individuals by Dean R. Snow Learning by Stephen J. Shennan Models by Bruce Winterhalder Natural Selection by Robert D. Leonard and George T. Jones Populations by Kevin Kelly