[1] He succeeded his uncle as 3rd Duke of Primo de Rivera and passed down the subsidiary title of Marquess of Estella to his son.
His father Fernando (1908-1936) was the youngest brother of José Antonio Primo de Rivera, the founder and leader of Falange Española.
Because of his friendship with then-prince Juan Carlos and his commitment to the restoration of the monarchy after General Franco's death, he lobbied inside the Francoist institutions, as instructed by the newly proclaimed king, to produce a candidate for Prime Minister, namely Adolfo Suárez, who was prepared to implement democratic reform.
His role was instrumental in that the new law made possible the new democratic reforms that would culminate in the Spanish Constitution of 1978.
He worked behind the scenes to ensure the support of some reluctant members of the Cortes, most notably his own aunt, Pilar Primo de Rivera, the leader of the regime's Women's Organization, who had been a stalwart of Franco's regime.