Stephen D. Biddle (born January 19, 1959) is an American author, historian, policy analyst and columnist whose work concentrates on U.S. foreign policy. He is perhaps best known for his award-winning 2004 book Military Power: Explaining Victory and Defeat in Modern Battle, published through Princeton University Press. He also has worked in groups under Generals Stanley McChrystal and David Petraeus forming U.S. counter-insurgency policy.