An idea can spring you into motion. A community provides support but does not imply neither intrinsic value nor deep knowledge.
A cause can touch you deeply and baffle you into action. A relationship (deep as it may be) does not equate neither to affinity nor to connected value.
The main shift on thought could be around these two concepts. A community is formed around an idea and valuable relationships are bonded by a cause.
You can create a community of thousands around the idea that “Yes, We Can” but you cannot squeeze that idea out of an existing community.
The topic deserves a much deeper interpretation but it is important to understand that online, ideas and causes seem to be the driving force forward. Hat tip to Brian Solis for the inspiration with his IdeasProject