Even embracing and cheering an idea is only the first step:
Truly world changing ideas are HARD:
take time to develop, and testing out and need to be confronted with reality to go through revision, fine tuning and allow them to remix. The original idea might be too abstract to be useful.

A great example is the Global Village Construction Set : a project by the opensourceecology.org, I wrote an article about it
If you think about it the GVCS, it is truly, truly profound: create an open source catalogue of plans for machines designed so that users can build their own production tools from scratch (or almost) from the plans and bootstrap an ENTIRE local economy with it.

It was founded in 2003, and featured in TED.com in 2012: everyone was raving about it. But turns out you can't buy the execution of this idea. It is an incredibly hard grind to prototype, document and distribute these designs and then get users to adopt them. They have made massive progress and it looks like a great community but they haven't quite reached escape velocity yet!

Turns out that it is extremely hard to turn such an idea into reality.
They are making great progress though, wish I could support them from Steemit.com !