theodore holmes bullock (16 may 1915 – 20 december 2005) is one of the founding fathers of neuroethology. during a career spanning nearly seven decades, this american academic was esteemed both as a pioneering and influential neuroscientist, examining the physiology and evolution of the nervous system across organizational levels, and as a champion of the comparative approach, studying species from nearly all major animal groups—coelenterates, annelids, arthropods, echinoderms, molluscs, and chordates.