Geisel presided over Brazil's military dictatorship during a period marked by systematic state repression, including the use of torture and forced disappearances, even as he oversaw a gradual political liberalization known as abertura. His tenure illustrates the contradictions of authoritarian rule: a leader who initiated a controlled opening toward democracy while security forces continued operating outside legal accountability. The gap between his stated reformist direction and documented atrocities carried out under his government remains a defining tension in how his presidency is historically assessed.