There are physical characteristics which are inherited. These include things like good looks, high intelligence, physical coordination. These attributes contribute to success in life, and success in life is a determinant of optimism.
Martin SeligmanTo the scientists of the Renaissance, your critic was really your ally, helping you advance upon reality. Critics in science are not like drama critics, determining flops and successes. Criticism to scientists is just another means of finding out whether they're wrong, like running another experiment to see if it confirms or refutes a theory. Along with the advocacy principle of the courtroom, It is one of the best ways human beings have evolved to get closer to the truth.
Martin SeligmanOptimism generates hope...hope releases dreams...dreams set goals...enthusiasm follows
Martin SeligmanThe pleasant life: a life that successfully pursues the positive emotions about the present, past, and future.
Martin Seligman