THE 2016 JAMES Q. WILSON AWARD FOR DISTINGUISHED SCHOLARSHIP IN THE DEFENSE OF A FREE SOCIETY
THE RICHARD HARWELL AWARD OF THE ATLANTA CIVIL WAR ROUND TABLE FOR GETTYSBURG: THE LAST INVASION, 2014
THE FLETCHER PRATT AWARD OF THE NEW YORK CITY CIVIL WAR ROUND TABLE FOR GETTYSBURG: THE LAST INVASION, 2014
THE GUGGENHEIM-LEHRMAN PRIZE IN MILITARY HISTORY FOR GETTYSBURG: THE LAST INVASION, 2014
THE LINCOLN PRIZE FOR GETTYSBURG: THE LAST INVASION, 2014
LINCOLN AWARD OF THE UNION LEAGUE OF PHILADELPHIA, 2013
WM. GARWOOD VISITING PROFESSOR, DEPARTMENT OF POLITICS, PRINCETON UNIVERSITY, 2010-2011
2010 ILLINOIS STATE HISTORICAL SOCIETY CERTIFICATE OF MERIT FOR ABRAHAM LINCOLN AS A MAN OF IDEAS (2009)
2009 BOOK PRIZE OF THE ABRAHAM LINCOLN INSTITUTE FOR LINCOLN AND DOUGLAS: THE DEBATES THAT DEFINED AMERICA
THE JOHN E. DOLIBOIS HISTORY PRIZE, MICHAEL COLGAN CENTER FOR THE STUDY OF AMERICAN HISTORY, MIAMI UNIVERSITY OF OHIO, HAMILTON, OH, APRIL 2009
LINCOLN BICENTENNIAL LAUREATE, THE LINCOLN ACADEMY OF ILLINOIS, SPRINGFIELD, IL, FEBRUARY 2009
LINCOLN AWARD OF THE LINCOLN GROUP OF THE DISTRICT OF COLUMBIA, MAY 2007
LINCOLN MEDAL OF THE UNION LEAGUE CLUB OF NEW YORK CITY, FEBRUARY 2006
MEDAL OF HONOR OF THE NATIONAL SOCIETY OF THE DAUGHTERS OF THE AMERICAN REVOLUTION, DECEMBER 2005
2005 BOOK PRIZE OF THE LINCOLN INSTITUTE FOR LINCOLN’S EMANCIPATION PROCLAMATION: THE END OF SLAVERY IN AMERICA
THE LINCOLN PRIZE FOR LINCOLN’S EMANCIPATION PROCLAMATION: THE END OF SLAVERY IN AMERICA, 2005
JOHN T. HUBBELL PRIZE FOR THE BEST ARTICLE OF 2002-2003 INCIVIL WAR HISTORY
VISITING FELLOW, JAMES MADISON FELLOWS PROGRAM, DEPARTMENT OF POLITICS, PRINCETON UNIVERSITY, 2002-2003
2000 BOOK PRIZE OF THE ABRAHAM LINCOLN INSTITUTE OF THE MID-ATLANTIC FOR ABRAHAM LINCOLN: REDEEMER PRESIDENT
THE LINCOLN PRIZE FOR ABRAHAM LINCOLN: REDEEMER PRESIDENT, 2000
FELLOW, THE CHARLES WARREN CENTER FOR STUDIES IN AMERICAN HISTORY, HARVARD UNIVERSITY, 1994-1995
ALBERT C. OUTLER PRIZE IN ECUMENICAL CHURCH HISTORY, THE AMERICAN SOCIETY OF CHURCH HISTORY, 1994
VISITING RESEARCH FELLOW, THE PHILADELPHIA CENTER FOR EARLY AMERICAN STUDIES, UNIVERSITY OF PENNSYLVANIA, 1992-1993
F.B. ARTZ SUMMER RESEARCH GRANT, OBERLIN COLLEGE, 1992
AMERICAN PHILOSOPHICAL SOCIETY RESEARCH GRANT, 1992
AMERICAN COUNCIL OF LEARNED SOCIETIES FELLOW, 1991-1992
NEH TRAVEL-TO-COLLECTIONS AWARDS, 1990-1991
AMERICAN LIBRARY ASSOCIATION CHOICE AWARD FOR EDWARDS ON THE WILL, 1989
DEAN’S AWARD FOR DISTINGUISHED GRADUATE TEACHING, UNIVERSITY OF PENNSYLVANIA, 1980
ALMOST-AWARD
BBC AUDIO BOXED SET OF THE LINCOLN-DOUGLAS DEBATES (WITH DAVID STRATHAIRN AS LINCOLN, RICHARD DREYFUSS AS STEPHEN A. DOUGLAS, AND DR. GUELZO PROVIDING A VOICE-OVER INTRODUCTION) WAS ONE OF FIVE FINALISTS IN THE CATEGORY NOMINATED FOR THE 2010 GRAMMY AWARDS.