There are tons and tons of ways to use Steemit to spread wealth and social change. You can promote Steemit, delegate if you have extra SP, support bots like @treeplanter or @steembasicincome who spread loy and love, and check out @livesustainably too. You can simply spread good information, good vibes, and good cheer too! There are numerous chareties already on here!
After some time and work I am sure we will all have big upvotes that make people jump for joy when they get them, and until then there are various other ways we can pitch our small couple cents into the bigger pool. If everyone on here contributes something, that would be a lot!