> They engaged in more dominant-aggressive behavior, which positively predicted attaining higher power, but also engaged in less communal and generous behavior,

> They engaged in more dominant-aggressive behavior, which positively predicted attaining higher power, but also engaged in less communal and generous behavior, which predicted attaining less power. So it's openly disagreeable personalities who have the disadvantage. I would think that successful manipulative (trait the study assigns to disagreeable) persons would engage in "communal and generous behavior" as tactic and generally hide their disagreeableness.