Reassurance about the State of the World

I was reading this post about the bad economic outlook in Greece, and it occurred to me (in a similar fashion as is transcribed below):

How nice it is that this person, and his wider community, can coordinate the exchange of information about all this activity – it's important that someone is paying attention; someone is fact-checking the numbers; someone is watching all the moves of all the players – it's great that there is now more of a connected audience for this little piece of the universe.

A lot of smart people I know are pessimistic about the world. Their actions betray their true beliefs, but this is what they maintain rhetorically.
I don't buy it.
We will fail to forestall all of our problems, but we will quietly prevent almost all of them.
And I'm reassured by the breathtaking diversity of thought I encounter every day.
Thank you thinkers!