Sachs, J. L., Mueller, U. G., Wilcox, T. P. & Bull, J. J. (2004). The Evolution of Cooperation. The Quarterly Review of Biology 79(2): 135–160. doi:10.1086/383541.
Not read. The summary is drawn from the abstract. A reading should check it first.
Why this is here
Adjacent material. A2 answered “Why does a partnership persist?” with “Mutualism theory, ecological dynamics, multilevel selection” and named no work. The record holds the theory of cooperation within species (LIT-498, LIT-501) but no synthesis between species. This is the standard one, and its byproduct-benefit route is the one the Black Queen dependencies (LIT-1568) take.