Quote Originally Posted by Montmorency View Post
This trope does not give us much of the story. I think we find that people who have some political views or orientations, maintain them throughout their lives to a large extent; that rather than a division between young and old, there is a division between eras, decades, or generations (as well as places) - and not in a linear conservative>liberal manner; that political positions which become more acceptable over time in the larger society, such as gay marriage, become more acceptable across most or all age groups, even to similar extents; that popular ideologically-marked criteria at one point in time shift or are replaced by other criteria, including vis-a-vis party identification or actual voting...

This has been commented on a lot in recent years:

http://www.pewresearch.org/fact-tank...ting-behavior/
http://www.pewforum.org/2016/05/12/c...-gay-marriage/
https://libres.uncg.edu/ir/asu/f/Lac...ing%202015.pdf
http://www.sciencedirect.com/science...61379413000875
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4347987/
https://www.nytimes.com/interactive/...-politics.html
http://nymag.com/scienceofus/2017/04...35-and-50.html
It still amounts to a preponderance of Labour voters in the age groups giving way to a preponderance of Conservative voters in the age groups, with the crossover point in the 35-40 group. Every younger group of 5 or so years is more Labour than its older neighbour, every older group or 5 or so years is more Conservative than its younger neighbour.