ultimately any system which harnesses the direction of distribution of large amounts of 'money' and thus also action associated with the money - can bring big changes :)
It is important to realise that we don't actually need 'money' to bring about the called for changes - we just need to stop allowing ourselves to be limited by the control system that money has become and instead learn to share resources and unify in intent to achieve the greatness we require.
steemit though, does facilitate the real magic in that it does bring people together, albeit in many cases motivated by the desire for money!