I think there is a chance that there is actually something to this.
A study at University College London in the UK has found that conservatives' brains have larger amygdalas than the brains of liberals. Amygdalas are responsible for fear and other "primitive" emotions. At the same time, conservatives' brains were also found to have a smaller anterior cingulate -- the part of the brain responsible for courage and optimism.
If the study is confirmed, it could give us the first medical explanation for why conservatives tend to be more receptive to threats of terrorism, for example, than liberals. And it may help to explain why conservatives like to plan based on the worst-case scenario, while liberals tend towards rosier outlooks.
I don't know anything about the science, I'm not a medical expert like the members of congress who drafted ObamaCare. The conclusions seem pretty feasible though when you consider "liberals tend towards rosier outlooks" is really just a polite way to say they're flexible enough to bury their heads in their asses.
It's how we get government healthcare when the government is running deficits that make the Grand Canyon look like a crack on the sidewalk.
It's why they think raising taxes on an economy that's so dead it makes the Clinton's marriage look alive is a good idea.
Liberals only see the downside to letting psychos have nukes if they vote Republican.
They think they can keep the climate of the ENTIRE world from going too high, and they can't even get plows going to remove the snow that, according to them, isn't even supposed to freakin' be there.
All of those things take A LOT of optimism. So I'll give these "experts" that much.
The only thing that I'm hung up on is that liberals have more courage. I don't know many liberal soldiers. They vote overwhelmingly conservative. I may be mistaken, but didn't the military establish the brig because soldiers protested that punishment by coersion to vote Democrat violated the 8th amendment?
In fact, liberals are always the ones that want to run from a fight. This alone puts the researchers findings on its head. How can conservatives be scaredy cats AND warmongers?
Then again, I guess it takes a lot of courage to tell people how to live and reduce their "carbon footprint" before diving into a pool at one of your mansions that suck up more energy in a month than the rest of us use in 2 years without heating it first.
To be fair to Al Gore, I'd wager he doesn't think his footprint is made of carbon so much as it's actually more like "optimistic hypocrisy."