The Osage empire, as most histories claim, was built by Osage men's prowess at hunting and war. But, as Tai S. Edwards observes in Osage Women and Empire, Osage cosmology defined men and women as necessary pairs; in their society, hunting and war, like everything else, involved both men and women. Only by studying the gender roles of both can we hope to understand the rise and fall of the Osage empire.