A number of theorists have proposed mechanisms suggesting that corporate social responsibility produces better financial results. Others subscribe to the theory that, realistically, less ethical means are necessary. This article contains an analysis of these perspectives drawing on observations from evolutionary game theory and nature. Based on these analyzes, it is concluded that the financial returns of corporate social responsibility and irresponsibility (CSR and CSI) are equal on average. The explanation is that CSR and CSI are driven to a state (...) of equilibrium, because if one or the other were to offer higher profits, it would attract more players who would compete for the best opportunities until there was no difference in average profit. Existing empirical research generally shows a positive correlation between CSR as measured and financial outcomes. It is argued that what is actually causing that finding is probably not CSR but management skill. More skillful managers, whether actually responsible or irresponsible, are able to obtain both higher profits and greater credit in imperfect measures of CSR. Next it is shown that this theory of equal returns implies greater moral freedom and therefore responsibility for business leaders. It is concluded that this insight can intensify the interest of decent business leaders in vigorously championing CSR. (shrink)