First carrot, then stick: how the adaptive hybridization of incentives promotes cooperation - I seem to be able to follow that one without having to follow too much of the math.  It's interesting for it's conclusion and for the method of simulation, which employs a number of useful mechanisms that I would like to understand in minor detail.

On the equivalence of several existential problems affected by game-theoretic goal setting. - That is the second half of an already short clip from an interview with Stuart Russell.   I discuss it more here.