Do humans need all their brainpower?

[TeeCee]

I've heard that in the theory of evolution, an organism only develops a particular feature when it really needs to. Sp why do we humans use such a tiny percentage of our full brain capacity?

[incitatus]

Its a bit of a myth that we dont use it all. If you do pet scans of the brainn it looks like a phone network. Trunk lines used all the time, regions used occasionally, but all of it used sooner or later. It is massively redundant, however. This is in an organisational sense, meaning that there are often several duplicate routes to the same function or information.