His father's family came from Corella , Navarra , where he was primogeniture . In the mid- eighteenth century the paternal grandfather, Baltasar Miñano, went to Valladolid to hold the position of treasurer of income. The father, Andrew Miñano and Las Casas (1756-1811), studied law at Valladolid, married in 1775 to Margaret of Bodya Becerril, family settled in Tierra de Campos . Andrés Miñano was mayor of Becerril and Trujillo , being named after a hearer of Canary , a position he did not play. He was a cultured man, trend clearly illustrated , and exerted a decisive influence on son, the future writer. In 1791 she placed her son in the seminary of Palencia , where he remained until 1794 , when he went on to study law at the University of Salamanca .
In 1795 Miñano moved to Toledo , where his father had managed to give the Cardinal Lorenzana illustrated and family ayo grandson Carlos III , the Infante Luis Maria de Borbon y Vallabriga . He was there for three and a half years, which he used to finish his legal studies. Then went to Sevilla accompanying the infant, who was just named archbishop of Andalusian metropolis. But soon he was appointed archbishop of Toledo, in 1800 , and returned with him to Miñano Manchego capital.
Falling Urquijo in 1801 the Inquisition was looking alleged Jansenists and was prosecuted by a complaint; that does not prevent him from being made subdeacon in 1802 and receiving a proposal from the Cardinal a portion of the Cathedral of Seville . Between 1801 and 1804 he worked on the issues of the Cardinal of Bourbon in court. In 1804 the council appointed him his deputy Sevillian business in court, but in August of the same year was ordered to return to Sevilla, where he did not move until the French invasion. There he befriended Alberto Lista , Félix José Reinoso , José María Blanco White , Cean Bermudez et cetera.
After the Mutiny of Aranjuez in 1808 he was sent to the Court so that they felicitase the new king, and there witnessed the riot of May 2 . In Seville, his father was appointed to the Supreme Council , which commissioned Sebastian various committees. In one of them he accompanied General Brown in his entry into Madrid (August 1808). When the French entered Seville, Miñano opted to become collaborator. He joined the Masons Bonapartist. Not only recognized Joseph I but became court advisor and after Napoleon's defeat had to emigrate to France . Bayonne reached in March 1813 and the following month he was in Paris . He moved to different parts of France.
In 1815 the ecclesiastical court proceeding against Sevilla Miñano being Frenchified , and in March 1817 he was declared "cleansed." But in late 1816 I was in Spain. By then begins to engage in literary work, beginning with the translation of the Compendium of historical revolutions ideologue Cabanis , which ended in 1818 but can only be published in 1820.
In 1820 published articles in The Constitutional and secularized during the Liberal Triennium collaborated on the 102 numbers The Censor , probably the most intellectual magazine this time alongside Alberto Lista and José Mamertus Gómez Hermosilla , and published by then ten brochures that constitute his most famous work of political Wailing lazy poor (1820), one of the great successes of satirical journalism and anticlerical of the time, which mixes with the manners Review clergy and Old Regime , thus showing a convinced liberal, and five letters to Don Justo Balance Pobrecito Bummer, a continuation of Sorrows and the eighteen Letters of Madrid, the latter two published serially in The Censor (1820-1822). Also collaborated in Impartial, which led his friend, also Frenchified Francisco Javier de Burgos .
Gradually he was desengañándose of liberalism veinteno , especially seeing the restrictive amnesty against the Josephites, but also about allegations he faced some of its articles, one of which earned him a sentence of one year in prison; even his enemies printed a pamphle