I was curious about the psychology behind collective action, so I had a dig around on the paper+patent discovery engine sparrho.com (disclaimer: I work there!)
There aren't that many free-to-access papers on this topic, and I'm no psychology expert (my PhD's in biochemistry), but I summarised 4 interesting papers here: https://www.sparrho.com/pinboard/marching-for-science-research-behind-protests/164012/landing/
I'd love to hear your thoughts and personal experiences from the March, and any expert opinion would be much appreciated!