American men began an earnest search for the meaning of manhood in the latter half of the 20th century and enlisted in such groups as Promise Keepers, Million Man March, National Congress of Men, and fathers' rights groups. This study chronicles those movements, as well as the more visible male activism of today in such groups as Proud Boys, Three Percenters, and Oath Keepers. The book explores the misogyny and militancy embodied in these new quests for manhood. The first section covers pop culture influences on conceptions of masculinity and moves from celebrity iconography to the institutional and organizational influences that men have relied on in the effort to make themselves masculine. The second section describes masculinity and men's movements in the 20th century, and the third section covers the 21st. The final chapters analyze the contrast between the more thoughtful men's movements before the turn of the century and the more militant and physical movements after 2000, posing and addressing critical questions about the relationship between prevailing ideals of masculinity and events like the January 6th insurrection.