¿Cómo se ama a alguien?¿ Por azar. Por caos? “El amor muestra en su origen ser contingente” afirma Lacan en el Seminario 21. El objetivo de este trabajo es desarrollar este enunciado, considerando al amor no como dualidad sino como Unario, acontecimiento, apertura al Eros, e intentando diferenciar la contingencia de la posibilidad. Palabras clave Amor, Azar, Acontecimiento, Contingencia Abstract FROM “URBANO” TO “INOCENCIO”. A CONTINGENCY ¿How is it that someone falls in love? ¿Is it by chance; is it by chaos? “Love shows in its origins to be contingent” says Lacan at his 21st Seminar .The purpose of the present work is to develop this statement -considering love not as a duality but as a unary, a happening, an opening to Eros- and to try as well to establish a difference between contingency and possibility. Key words Love, Chance, Happening, Contingency