On 9 January 1899, he returned to Cuba to pay respects to the deceased García by the request of his son, Carlos García Vélez. He continued to combat annexionist calls and supported progressive causes.[10] There was public outrage at the suffrage grants drafted by the American administration in 1900, which only lent the right to men who owned at least $250 in assets and were literate. They were deemed as worse than those in the Autonomy Charter of Cuba [es] of 25 November 1897 that established universal manhood suffrage.[11][12] Hernández was a member of the Cuban commission that collaborated with the administration on this policy,[c][13] but agreed with the dissidents.[11] Since 1899, he worked as a professor of obstetrics at the Clinic of the University of Havana.[2]
In 1911, with Domingo F. Ramos Delgado (1881–1961), another student of Pinard, he published Homicultura (English: Homiculture). They posited an expansive eugenicist concept based on Pinard's puericulture;[7][16] it outlined a national project for maternal and child health, which were seen as linked,[17] and "took a holistic view of view of influences on human development, linking 'human fitness to a nation’s capacity for peace, order, and prosperity.'"[16] The proposal applied foreign policies such as German Kinderschutzen [de], centers for women who recently gave birth; French gouttes de lait [fr], distribution centers for pasteurized milk; French crèches, and the French Roussel Law, which monitored wet nursing. Its intended immediate effect was to reduce infant mortality.[17] They also published for general audiences in the journal Vida Nueva. In 1913, the National Homiculture League was founded and included people such as Francisco Carrera y Jústiz and María Luisa Dolz. To spread the idea, Hernández taught a class on homiculture and preventative sexual health at the José Martí Popular University [es]. Proposals in La Habana Province[d] that stemmed from homiculture included prenuptial medical examinations, and legal protection for women, and campaigns for improved working conditions and child nutrition.[16] Homiculture did not receive attention from the government until President Mario García Menocal established the Children's Hygiene Service, which accepted Hernández and Ramos's proposals: inspections on wet nurses and milk and tubercularsanatoriums. The service did not live up to the expectations of the pair as it was limited to Havana and acted as a means of surveillance on women, schools, and daycares. Hernández's wife, Ángeles Mesa de Hernández, along with other Havana women formed the Ladies Committee for the Protection of Children in 1914; it served the poor children of working women as a daycare and source of nutritious food. However, the government did not provide financial support. Hernández consistently followed neo-Lamarckian eugenics but Ramos increasingly turned Mendelian towards the 1920s.[18] Ramos established the Pan American Central Office of Eugenics and Homiculture which had its first international conference in 1927. 28 delegates, representing 16 countries, and other unofficial members attended; included were Mexican Rafael Santamarina Sola (1884–1966), Peruvian Carlos Enrique Paz Soldán [es], and American Charles Davenport. Ramos, supported by Davenport, suggested a white supremacist code entailing the classification of non-white immigrants and indigenous people as inferior and promoted policies of forced sterilization and racial segregation, as done in the United States. The code was unpopular and the Argentine, Costa Rican, Mexican, and Peruvian delegates in particular contested.[19] In addition to positing homiculture, Hernández modified the Tarnierforeceps and Farabeuf's pelvimeter, and developed method for an open-air symphysiotomy.[2]
Hoffnung-Garskof, Jesse (7 May 2019). Racial migrations: New York City and the revolutionary politics of the Spanish Caribbean, 1850-1902. Princeton, New Jersey: De Gruyter. ISBN9780691185750.
Jeifets, Víctor; Jeifets, Lazar (2017). América Latina en la internacional comunista 1919-1943.: diccionario biografico. Buenos Aires: CLACSO. ISBN978-2-8218-9582-9.
Tarragó, Rafael E. (December 2009). "La lucha en las Cortes de España por el sufragio universal en Cuba". Colonial Latin American Review. 18 (3): 383–406. doi:10.1080/10609160903336218. S2CID162423266.