Who said we need to put our individual wants aside for the good of the whole group

Plato

Explanation:

As part of the political philosophy, Plato stated that one of the most fundamental political is justice. The search for justice was discussed in Book I of the Republic as individuals rights in contrasts to the common interest.

You shouldn't.

Explanation:

Because you can never I think that the people are going to do for you, what you do for them, that's a great mistake that a lot of people do.