Overall, most of the reviewers agree that Principles of Brain Evolution was a welcome addition to the field, and kindly describe it as carefully researched and lucidly written. Thereafter, they note some gaps – principally, adaptive scenarios, microevolutionary studies, and computational models. I here admit to those deficiencies but explain why they exist and how they might be filled. In addition, one commentator criticizes my analysis of hominin brain evolution, and another finds my principle of “large equals well-connected” to be inconsistent with the data. I rebut those two critiques. Hopefully, this process of critique and counterpoint will stimulate some readers to pursue the mentioned thoughts and to engage in new research.