truth_b_known
Your input is interesting, as is the article you listed. Yours was the kind of feedback I was hoping for. And I do agree that Leftism and Liberalism are not exactly the same thing.
That said, I am of the opinion that Liberalism is currently being swallowed up by Leftism. I am not sure there are many middle-of-the-road liberals around any longer because if they do not espouse the extreme Leftist ideology that is being shoved down everyone's throat today, they will be "cancelled" and shouted down along with any true moderates not to mention conservatives.
For example, being Liberal in the U.S. used to mean that although the U.S. has faults and needs to be reformed, it is still the greatest nation on Earth. I don't see that espoused much any more. It is now more "The U.S. was formed out of racism and misogyny and should be torn down completely." Notice the Left says "Defund the Police" not "Reform the Police"... and I don't hear of many Liberals arguing against that nowadays for fear they fall into the conservative camp and be shunned by their peers.
For example, being Liberal used to mean that Capitalism is a valuable system that must be tweaked to benefit the whole more fairly - it can be reformed. Leftism says Capitalism cannot be reformed at all and we must take on a Socialist approach to everything. Looking at what the Joe Biden administration is doing right now shows that the Leftist ideology has taken over, without any real thought on the consequences. They are still paying people to sit on their couches rather than work at the all too many jobs that are available out there that employers cannot even begin to fill because they are fighting against our socialist-bent government. To what end? Why are we spending printed money for all of this? Leftism, that is why. Liberals would have made sure everyone works and tried to get a more "fair" wage. Heck, even Bill Clinton reformed the Welfare system because he understood it was better to give people a chance to work for their money on their own rather than suckling at the teat of the government their whole lives. Alas, there are no more Bill Clintons any longer. Just Leftists. Extreme ones like Bernie and AOC and forced ones like Biden and Pelosi.
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I also think the article you listed had suppositions that I don't think I totally agree with. For one, it tied being conservative with being religious way too much. Heck, it's hypothesis weighs almost entirely on that premise. But then how do you explain our own board's Simon? He is definitely no longer religious, but his political ideology would be put squarely in the conservative category on most things. Caitlyn Jenner and many thousands like her are other examples. That is way too simple for me. I believe conflating religiousness with conservatism is much more egregious than conflating Liberalism with Leftism.
The one conclusion jump you also make that I simply don't agree with is that the Pew study's "mental health condition" is only neuroticism. How would you know that? Certainly neurosis could be one of those "mental health conditions" but the question posed was "has a doctor or other healthcare provider told you that you had a mental health condition" which as pointed out by another poster is a very broad question. You are narrowing it down way too much. And, even so, it does say that Liberals are AT LEAST neurotic - not exactly a good calling card. "Hey mom, I met a new girl I want to introduce you to. Yes, she has mental health problems, but don't worry, she's only neurotic."
The other thing that comes into question is simply a person's emotional makeup to begin with, before they ever even take on what we would call a political ideology. What I mean by that is this: Does Liberalism lead to mental health conditions or does having a mental health condition lead to being Liberal? Chicken or egg?
Either way, I would rather be in the percentage group without all that.