After Franco's death on November 20, 1975, the monarchy of Juan Carlos I was established. The King appointed Adolfo Suarez as President of the Government with the idea of democratically shaping the political future of Spain. The new Government presented a Political Reform Law project , C by the Spanish people in a national referendum at the end of 1976. In this way, the President of the Government gave decisive impetus to the dismantling of the institutional scaffolding of Franco's regime.

In the first elections, held on June 15, 1977, the coalition led by President Suárez, the Unión del Centro Democrático (UCD), won, followed by the Partido Socialista Obrero Español (PSOE), led by Felipe González.

Once the 1978 Constitution was approved, voted by a majority of the citizens, and the Transition was peacefully overcome, the first constitutional president of democracy, Suárez, continued with the task of building the edifice of the democratic system. In the 1979 general elections, the UCD won again and the PSOE came second. In 1980, the economic crisis condemned thousands of workers to unemployment, ETA murdered a hundred people and the President of the Government felt tired and discouraged in the face of these and other serious problems. Suarez proposed to hand over the head of the Government to the vice-president Leopoldo Calvo-Sotelo.

On February 23, 1981, in the middle of the investiture session, a coup d'état took place in the palace of congress. The deputies suffered hours of anguish during the kidnapping at the hands of a group of civil guards led by Lieutenant Colonel Antonio Tejero, who had already attempted another coup in 1978. In Valencia, Captain General Jaime Milans del Bosch ordered the tanks to take to the streets. Everything seems to indicate that the coup plotters, led by General Alfonso Armada (former tutor of the king), intended to impose an authoritarian government of national unity, led by a military officer. The coup failed. Spanish democracy emerged strengthened from this event when thousands of citizens took to the streets days later, demanding freedom and democracy. During the brief government of Calvo-Sotelo, Spain joined NATO in May 1982 with the civil service examination of the PSOE and the PCE.

Undoubtedly, Adolfo Suárez became the man core topic of the Transition, as highlighted in the book by Juan Francisco Fuentes, graduate Adolfo Suárez. Biografía política' (Barcelona, 2011). Now that he is no longer with us, it is worthwhile to analyze Suarez's work in the framework of the Spanish history of the 20th century and thus, it could be concluded that he was one of the great Spanish politicians of the 20th century.