While Chair for Social Biology at the London School of Economics, Hogben unleashed a relentless attack on the British eugenics movement, which was at its apex in the 1920s and 1930s. In contrast to eugenicists, who commonly drew a strict line between heredity (or nature) and environment (or nurture), Hogben highlighted the 'interdependence of nature and nurture'. Hogben's appeal to this interdependence of nature and nurture marked the first time gene-environment interaction (or 'gene-environment interplay') was used to undermine statistical attempts to partition the contributions of nature and nurture, as well as the eugenic implications drawn from those statistics. Hogben's foil throughout this period was R.A. Fisher, the leading scientist-eugenicist of the day (Tabery 2008).