This week we are joined by David Zachariah,a Researcher in machine learning in Uppsala University and a political econo-physicist in his spare time. We discuss the seminal work of Machover and Farjoun, 'Laws of Chaos', which introduced the techniques of statistical mechanics to world of political economy. He tells us about the empirical evidence for the predictions made by Machover and Farjoun, and subsequent work in the field, including his own work into understanding the mechanics of the rate of profit.