Humans are becoming dumb day by day. They are getting all resources with using little brain. The only one thing driving them to use head is earn money or to get power. But many do not use it even for that.
Anyways, my main motive was to write about how future humans will use power of multiple brains to think about a same thing with inputs from all the brains.
Let's say you are fighting a war against a country. Decision taker of the war has to have knowledge about many things which a single human brain cannot handle or some time, time is not enough to train the brain.
What you need to do is just 'connect' the brain of generals in different areas and let one brain use power of other brains to get analysis about situation in other front and take decision. This is not as easy as it seems but if done, picture of human society, job description, educational systems will change radically.