The Tsar's Colonels is an impressive study that demonstrates how the modernization of Russia's General Staff during the second half of the 19th century re-shaped its intellectual and strategic outlook and equipped the staff to play a strong, and at times dominant, role in shaping Russian foreign policy...[It] contributes to a number of debates in Russian military and social history and offers new insights on the structural roots of the Great War, and on the theoretical problems of modernization and professionalization. Rich's book provides a fascinating account of how the Imperial Russian Army struggled to modernize in a Darwinian world that dealt harshly with those who failed to adapt to changes in technology and military art.