2020 ushered in a full year of major change and renewed a lot of conversations about how we work, live, and cooperate in organizations and societies. In that spirit, we discuss Melville Dalton's classic 1959 book "Men Who Manage: Fusions of Feeling and Theory in Administration." The study provided an intimate look at how men (as these were all men at the time) entered into the managerial culture of a firm, how the separations between managers are workers were structured and maintained, and how managers felt about their standing -- which ranged from secure to tenuous. In Part 1, we focus on the study itself, which is still very relevant not only for understanding what happens within the circle of managers but also how the boundaries can exclude others, particularly along gender lines.