He is a Professor of Political Science and directs the program of Russian studies at the Autonomous University in Madrid.
He wrote about twenty books. In Galician language he wrote O Castelo de fogos (Novo Século, Iria Flavia, 1991); Europa sen folgos (Sotelo Blanco, Compostela, 1994); A Nova desorde internacional (Abrente, Compostela, 1998); ¿Un novo terceiro mundo? (Ludus, A Coruña, 2000). In Castilian language he wrote Crisis y cambio en la Europa del Este (Alianza, Madrid, 1995); Las transiciones en la Europa central y oriental (Catarata, Madrid, 1998); La Unión Soviética, 1917-1991 (Síntesis, Madrid, 1999); Para entender el conflicto de Kosovo (Catarata, Madrid, 1999); La explosión soviética (Espasa, Madrid, 2000).He usually collaborates in the newspapers El País, Diario 16 and El Correo de Bilbao. Besides, he works as commentator in the radio station 'Cadena Ser'.