 Soldiers before this time had written treatises on various military subjects, but none had undertaken a great philosophical examination of war on the scale of those written by Clausewitz and Leo Tolstoy, both of which were inspired by the events of the Napoleonic Era.Clausewitz's work is still studied today, demonstrating its continued relevance.More than sixteen major English-language books that focused specifically on his work were published between 2005 and 2014, whereas his 19th-century rival Jomini faded from influence.