Gintis and Helbing discuss some of the major holes in the set of phenomena that are addressed in modern theory of social systems, and argue for a unified approach to fill those holes. Their paper is a major contribution. However it overlooks some of the holes in modern theory that are arguably are at least as important as the ones that Gintis and Helbing consider. In this short commentary I present and discuss two such holes in modern theory of social systems, holes that greatly handicap our theoretical understanding of social systems.