Interesting post, just a small point about Darwinian thinking. Darwin's original writings noted as much about co-operative behaviour and, in terms of what you are writing about, what might be called caring behaviour, as he did about competitive behaviour. However, his writings about competitive behaviour and survival of the fittest suited a particular 19th century capitalist rhetoric and were taken out of context.
There is evidence that co-operative behaviour - looking out for each other or caring for each other - is hard wired into our dna and that we don't like cheating or poor social behaviour. There is also evidence that there is a crucial period in the early years (about two or three years of age, I think) where these senses and behaviours are developed given the right stimulus and responses which may go some way to explaining why some people don't develop empathy and sympathy.