Generativity is an extension of love into the future. It is a concern for the next generation and all future generations. As such, it is considerably less "selfish" than the intimacy of the previous stage: Intimacy, the love between lovers or friends, is a love between equals, and it is necessarily reciprocal. Oh, of course we love each other unselfishly, but the reality is such that, if the love is not returned, we don't consider it a true love. With generativity, that implicit expectation of reciprocity isn't there, at least not as strongly. Few parents expect a "return on their investment" from their children; If they do, we don't think of them as very good parents! Although the majority of people practice generativity by having and raising children, there are many other ways as well. Erikson considers teaching, writing, invention, the arts and sciences, social activism, and generally contributing to the welfare of future generations to be generativity as well -- anything, in fact, that satisfies that old "need to be needed."
Stagnation, on the other hand, is self-absorption, caring for no-one. The stagnant person ceases to be a productive member of society. It is perhaps hard to imagine that we should have any "stagnation" in our lives, but the maladaptive tendency Erikson calls overextension illustrates the problem: Some people try to be so generative that they no longer allow time for themselves, for rest and relaxation. The person who is overextended no longer contributes well. I'm sure we all know someone who belongs to so many clubs, or is devoted to so many causes, or tries to take so many