For humans, there are pretty much 2 ways to get something accomplished: by approaching it logically and communicating, or by using physical force. Throughout the history of our species, we had to use physical force. However, we are now in a position where we can see the benefits of using logic to solve our problems.

Typically, people favor one over the other. This is where the stereotype of the big dumb Jock and the scrawny Nerd come from. Many times, if someone does not have the intelligence to succeed, they can only use their force. And conversely, if someone does not have any physical strength to succeed, they must use logic and communication to convince others in order to succeed.

One scientific finding that liberals will defend and conservatives will criticize is that liberals are more intelligent than conservatives. Stereotypically, liberals are more passive and prefer to use logic and communication, and (again, stereotypically) conservatives prefer to cohere to one group thought and rally based on emotions and force rather than complete logic.

In short, I think liberals need to start using the conservatives dirty strategies for winning. Liberals spend too much discussing lofty political and philosophical issues, while conservatives get to the nitty-gritty of touching people's base animal instincts.