“…Yet, not all categories in the world are essentialized. Many factors may contribute to which categories are more likely to be essentialized, and several studies suggest that essentialism based on race may not emerge spontaneously in early childhood but rather may follow a relatively protracted developmental trajectory (e.g., Rhodes & Gelman, ; Roberts & Gelman, ; Weisman, Johnson, & Shutts, ). These findings dovetail with evolutionary theory about social categorization, which asserts that race is a relatively new psychological phenomenon, in terms of human history (Kinzler, Shutts, & Correll, ; Kurzban, Tooby, & Cosmides, ; Lieberman, Oum, & Kurzban, ; Van Bavel & Cunningham, ).…”