This historical essay is presented as a tribute to a generation of diplomats in Mexico, represented by the figure of Gilberto Bosques, who faced enormous difficulties to defend their ideals, and showed their support to thousands of people suffering from the tragedies of war in Spain and Europe, during the late 1930s and early 1940s. Influenced by the battles and the outcome of the Mexican Revolution, these representatives embraced the cause of freedom and self-determination of nations to oppose the dangers posed by the arrival of totalitarian fascism in Europe. At the same time, their help proved crucial to the economic, cultural, scientific and artistic development of Mexico during the post-revolutionary and postwar years, by facilitating the migration and insertion to the Mexican society of qualified professionals, who were being persecuted in their countries. The following paragraphs highlight the formation, mission and legacy of this revolutionary diplomat.