The greatest achievement of neuropsychoanalysis has been to put biology in touch with depth psychology in the modern era (e.g., Kaplan-Solms & Solms, 2000). I assume a theory’s depth is roughly equivalent to its generality, or its ability to contain and explain many less general ideas. The most general concepts are needed when attempting to integrate concepts at multiple levels of analysis. For a theory to be deep, the connections between the general, overarching concepts and ideas lower in the conceptual hierarchy need to be made explicit.