due to the complexity of the human social world, which is what actually gives us our greatest

survival advantage, the fact that we connect so well with each other, that we're pack animals. It's also the reason why we have

such complex and large brains. The frontal lobes of human beings are very complex because it takes so much

processing to allow us to successfully navigate through the world of other people.

We send so many complex messages to each other and it's so hard to figure out what is the,

you know, just immediately to do things that we do effortlessly, like figure out somebody

who's being honest or not being honest when somebody's trustworthy or not trustworthy, when someone

is emotionally available, or whether they're not emotionally available

takes a lot of processing.

So the human brain does this really well because it actually has two different groups of processors, one of which happens largely consciously and the other of which happens largely unconsciously.

You're familiar with it because by... which happens largely unconsciously.

You're familiar with it because by now, as you're all adults,

who have heard that we have twin hemispheres, left and right. You will have heard that in other words the brain is bilateral and

that if the both hemispheres did the exact same thing.

There would be no purpose for their being

not only the bilateral structure,

but also when we look at people with FMRI scans doing many tasks,

the amount of processing being done in one lobe or the other is significantly different.

Now that's not to say that the twin hemispheres do things completely independently

or that there's ever activities that are entirely left hemispheric or entirely right

hemispheric. In fact, we use both of them almost all the time and yet they're so

different in the way they view the world and the way they

...