Associationism is a theory that connects learning to thought based on principles of the organism’s causal history. Since its early roots, associationists have sought to use the history of an organism’s experience as the main sculptor of cognitive architecture. In its most basic form, associationism has claimed that pairs of thoughts become associated based on the organism’s past experience. So, for example, a basic form of associationism (such as Hume’s) might claim that the frequency with which an organism has come into contact with Xs and Ys in one’s environment determines the frequency with which thoughts about Xs and thoughts about Ys will arise together in the organism’s future.