Government.

[Human No More]

I think that in a large society, governments are necessary, unfortunately. That said, we give them FAR too much power, and they forget that they are only there because we chose them (just look at the current political situation here if you want an example of that, lol)
To work properly, governments need less power without having to actually find out the public's opinion, shorter terms and a more democratic system of election in many countries (e.g. the US or UK)