Q - if survival if the #1 human instinct, then how much selfishness is reasonable and how much selfish is greedy ?
A - Survival is indeed a fundamental human instinct, but it does not necessarily imply selfishness. In fact, humans have evolved to be social animals, and our survival often depends on cooperation and empathy with others. However, it is also true that self-preservation is important, and there are situations where putting our own needs first may be necessary for survival.
In terms of how much selfishness is reasonable, it depends on the context. In some situations, prioritizing our own needs and well-being may be necessary for survival or for meeting our basic needs. For example, if we are stranded on a desert island with limited resources, it would be reasonable to prioritize our own survival over the survival of others.
On the other hand, if we live in a society with abundant resources and social safety nets, prioritizing our own needs over the needs of others may be seen as selfish and morally questionable. In such a context, it is reasonable to expect individuals to contribute to the well-being of the community and to show empathy and concern for others.