Portugal's experience with democracy before the Carnation Revolution of 1974 had not been particularly successful. Its First Republic lasted only sixteen years, from 1910 to 1926. Under the republic, parliamentary institutions worked poorly and were soon discredited. Political corruption and economic mismanagement were widespread. The 28 May 1926 coup d'état ended the First Republic and ushered in first the Ditadura Nacional and then the "Estado Novo" ("New State") period.
The republic was replaced by a military dictatorship that promised order, authority, and discipline. The military regime abolished political parties, took steps against the small but vocal Marxist groups, and did away with republican institutions. In 1928 it invited University of Coimbra professor António de Oliveira Salazar to serve as minister of finance. In 1932 he became Prime Minister. That year marked the beginning of his regime, the New State (Estado Novo).
Under Salazar (1932–68), Portugal became, at least formally, a corporative state. The new constitution of 1933 embodied the corporatist theory, under which government was to be formed of economic entities organized according to their function, rather than by individual representation. Employers were to form one group, labor another, and they and other groups were to deal with one another through their representative organizations.
In reality, however, Salazar headed an dictatorship with the help of an efficient secret police - the PIDE. Strict censorship was introduced, the politically suspect were monitored, and the regime's opponents were jailed, sent into exile, and occasionally killed.