So, what does “common greater good” mean for us?

Common = community, it means people coming together in order to create change.

Greater = the more we are, more impact our actions have

Good = positive, optimistic, peaceful, etc.

In other words,

Common greater good = Positive change with high impact

That’s what we can do by coming together and trying to act in order for everyone to have access more or less to the same benefits on the planet.