In Learned Optimism, Martin Seligman says that if you have a pessimistic explanatory style, when something bad happens to you, you blame yourself. I think he is right.
Seligman then goes on to say that if you have an optimistic explanatory style, when something bad happens to you, you blame it on others.
I do not think this is right. I do not think this is what optimism means. And I don't think these are the only choices. The bad effect on you could be the effect of social structure - of the unintended consequences of other people's actions, which were not bad in themselves or aimed at you. The bad effect could be due to nature, or even higher forces.
This individual focus - either it is my fault or it is your fault - may be an occupational hazard of psychology. Or it may be that he had found some test items that correlate with the opposite of pessimism, some of which are related to optimism, and some of which are not.
I think Seligman is right about pessimism, but wrong about optimism.