@doctormo @selzero This one is clear, it's about "progressive" vs "conservative" social values, fifteen enumerated issues, it's not about economic policy, and it's about people's values over time versus people's labeling of themselves over time.
According to the article the US is going ever more progressive, but that's not how it looks in Europe. In specific issues the trend is toward progressive, but not overall.
On the one-dimensional political scale (yes, reality is more complex) government regulation of the capitalist economy generally goes together with progressive social views, which is why I phrased it the way I did, it's all proxies.