There are different kinds of attitudes in communities. In one, the members see the others as a springboard to success but do not care about whether the others are successful.
In others, there is an attitude of mutual care, where success mean success for everyone and where the individuals don’t even consider success outside of a common success.
For that to happen, everyone has to be responsible for everyone else such that each member knows that all of the others ‘have their back’ so to speak.