> Sharing can be for the greater good.

One of the fundamental problems if humanity is that the majority of people will happily contribute to the public commons and share with everyone, enriching us all. But there is a minority of avaricious people who will do everything in their power to claim the commons for themselves.

This problem is intractable because the more people are good faith actors sharing the public good, the more valuable that commons becomes, and the more it incentivizes people to try take it.