“…During the last century, the richness and symmetry of this outlook have wavered, at times reaching contrasting extremes: from many‐sidedness and great flexibility to rigid geneticization. Galton's, Weismann's, and Johannsen's work and views of separation between the internal, inflexible, deeper and the external, weaker, shallower, together with the later amalgamation of genetics and Darwinism, played an important role in the ‘rigidization’ of heredity, influencing the dynamics not only within the biological sciences but also within the social sciences and anthropology (Meloni , 66). The discovery of the double helix in the 1950s and the following advances in molecular biology, among other aspects, further affected the tides and currents in and around genetics and strengthened the ‘hard inheritance’ outlook.…”