Figures 1 & 2

Figure 1. Forming bridging arguments between arguments between archaeological evidence and cognitive abilities, via behavioural interpretations (after Coolidge et al. 2016); and Figure 2. Archaeological evidence results from an interaction between behavioural, mental and neural systems (after Barnard 2010). In the behavioural architecture of tool-making (a), self- control is a component (c) of the individual knapper’s abilities (b). Self-control is the result of multiple cognitive capabilities interacting within the overall mental architecture.