The Republican Brain is a throwback. It's tribal. It's wired differently... A neurologist can identify a "Republican brain" through a CAT scan or MRI alone.
http://www.smithsonianmag.com/scien...efs-with-83-percent-accuracy-17536124/?no-ist
Neuroscience is still an emerging field that suffers from significant replicability problems and questions about the correctness of methodology, small samples and what findings can be stated on the back of research. These problems are noted by may practitioners within the field.
Functional magnetic resonance imaging (fMRI) studies of emotion, personality, and social cognition have drawn much attention in recent years, with high-profile studies frequently reporting extremely high (e.g., >.8) correlations between brain activation and personality measures. We show that these correlations are higher than should be expected given the (evidently limited) reliability of both fMRI and personality measures.
Puzzlingly High Correlations in fMRI Studies of Emotion, Personality, and Social Cognition1
Perspectives on Psychological Science May 2009 vol. 4 no. 3 274-290
I'm not going to pretend I'm an expert on neuroscience, but given the high error rate of publications, and the limited understanding we have about the brain it is not generally prudent to treat such studies pretty tentatively. Even if we accept that you can reasonably accurately tell difference via fmri (which given the sample was 22 Republicans who were on average 6 years older than the Dems in the study is far from cast iron), what this means in terms of personality characteristics is even less certain.
Such findings are potentially of interest and might well show relevant factors, but aren't yet accurate enough to be too confident about.
it blindly follows perceived authority -- like sheep.
This seems to be a touch essentialist and overgeneralising.
Right-wing authoritarians are people who have a high degree of willingness to submit to authorities they perceive as established and legitimate, who adhere to societal conventions and norms, and who are hostile and punitive in their attitudes towards people who don't adhere to them.
How do you explain the high degree of consensus amongst various liberal communities. If you look at left wing students at university there seems to be a very strong consensus around issues of political correctness and severe reactions against those perceived to be breaking these rules. Is this uniformity arrived at through independent thought?
What about the degree of influence of non-authority opinion leaders? Lots of people simply parrot the responses of their favourite social commentators.
What about when leftists used to be massive apologists for Soviet Communism, the so called 'useful idiots'?
Perhaps it is environmental characteristics that determine the level of 'sheeple-ness' rather than internal political persuasion.
You mentioned that liberals are more 'socially connected', perhaps this leads them to be 'sheeple' in regard to peer pressure?
The vast majority of humans are affected by social pressures to some extent. If hypothetically liberals were more affected by peer pressure and conservatives were more affected by authority figure, would we consider one 'better' or 'worse' than the other?
imo the issue is very complicated given high degrees of political polarisation and that we all evolved to be influenced by a complex web of social pressures.
Such a broad question is very difficult to answer without a whole range of additional evidence that may, or may not, exist.