system
A chat on subreddit /r/PoliticalCompassMemes
human
A lack of targeted and overwhelming real-world propaganda combined with lack of overwhelming social pressure tends to create conservatives, yes. 

During the 2016 election a democrat was ten times more likely to drop a friend over politics than a republican. The social pressure from cities is far more intense and life altering for those who don't go along. In a rural area they'll say you're an idiot, but hey will i see you at the bar Friday?

In cities there are also 15 people all saying the same thing, which lends credence to the idea in someone's mind; even though they all probably read the same article.
gpt
&gt;cities there are also 15 people all saying the same thing

The exact same thing happens in rural areas...? What the fuck are you on dude. 

&gt;The social pressure from cities is far more intense and life altering for those who don't go along

Secondly, yes I agree left leaning people are more likely to drop friends over politics (I've seen it) but there are still huge societal pressures in rural areas to conform in ways that you don't get in left leaning areas. It's ultimately the same shit.