You can only become intellectually an adult, so to speak, if you break through domain dependence.

Nassim Taleb

Taleb runs an interesting Facebook, but if you don't want to get a Facebook account, I expect that a lot of this material will be in his upcoming book about anti-fragility (systems which get stronger when stressed).

I just realized that his domain dependence is equivalent to Rand's "concrete-bound mentality"-- in both cases, it's getting stuck on a single example rather than seeing general principles.