One of the personalities who with his life and work have most influenced the new generations of Mexican diplomats is Genaro Estrada, to whose memory the Essays section of this edition of the Revista Mexicana de Política Exterior is dedicated. Don Genaro Estrada is usually remembered mainly for the invocation of the Estrada Doctrine, frequently mentioned and not always well understood, but also for other of the multiple activities that he developed in life and in which he also left an indelible mark. The materials reproduced here are intended to account for the intense and diversified work of don Genaro.