Fernando Tarrida del Mármol (1861 – 1915) was a mathematics professor born in Cuba and raised in Catalonia best known for proposing "anarchism without adjectives", the idea that anarchists should set aside their debates over the most preferable economic systems and acknowledge their commonality in ultimate aims.

Following the passing away of Margarita, Juan Tarrida moved back to Spain in 1873, establishing shoe and boot manufacturing plant in the Catalan town of Sitges.

[3] Tarrida gave public lectures and wrote about anarchism for libertarian journals,[2] and developed a friendship with the Spanish anarchist Anselmo Lorenzo.

[5] Tarrida gave this speech at the Bellas Artes palace as a representative of an affinity group in commemoration of the Chicago Haymarket affair two years prior.

Deported at its conclusion, Tarrida wrote Les inquisiteurs d'Espagne (Montjuich, Cuba, Philippines), which was influential in spreading news of the Montjuïc events and Spanish association with barbarism widely.