His research interests lie at the intersection of social and cultural evolution, historical macrosociology, economic history,
mathematical modeling of long-term social processes, and the construction and analysis of historical databases.
How do human societies evolve?
Why do we see such a staggering degree of inequality in effectiveness of governance and economic performance among nations?
Currently he investigates a set of broad and interrelated questions: In particular, what processes explain the evolution of ultrasociality—our capacity to cooperate in huge anonymous societies of millions?