In the past decade and a half, scientific discoveries brought to light the prospect that tackle football causes serious brain trauma. This raised questions about the sport’s ethical permissibility. By employing scientific, philosophical, sociological, and historical findings, I consider whether it is ethically defensible to permit adults to play the game. My approach works within the bounds of both the ethical theory of liberalism and incorporates several sociological theories focused on gender. I propose that external cultural influences deserve some credit for shaping decisions to participate in America’s most popular spectator sport and contend that societies must establish genuinely pluralistic and inclusive gender ideologies and structures to ensure football’s permissibility. In particular, I suggest that to ensure that tackle football is ethical for adults, the presence and prominence of gender pluralism and inclusivity in youth settings are necessary.