In my opinion this is one of the most important and useful pieces of Marxist theory in the past few decades.
One thing I constantly encounter amongst young millennial and zoomer Socialists especially of the more woke/idpol variety is that they have absolutely no understanding of the concepts of relative risk and self interest, raised or lowered expectations, plausibility, assessment of leverage power etc - stuff that is very obvious to working class people and especially trade unionists. So many young earnest revolutionaries think that the people don't revolt because basically of brainworms and that they just need to read more books and get why capitalism is bad or whatever. No, there's instrumental rationality and logic there which needs to be understood. People look at the forces around them and leverage power they have - filtered through media and bullshit of course - and decide what they think is realistic accordingly.
It is a lack of this understanding that led, for Chibber, in part, to the ultimate post '68 cultural turn in the Left - to explain why western workers wouldn't revolt, leftoid students and grads decided it must be muh hegemony brainworms and racism (rather than that shock horror social democratic keynesianism in a booming economy was doing well for them relatively speaking) so they went in search of fetishised new inherently revolutionary classes and subjects - far off foreign struggles, women, sexual minorities, racial minorities etc etc etc. This process is still going on today. And I think it also serves as a sort of form of avoidance for a Left which is increasingly rooted in universities - anything to avoid engaging with people where they actually are and your own working class instead of fetishising sub groups of it.
There really needs to be a risk and Socialism 101 lecture derived from this book to kick the idpol out of people, the idealism, the frustrated seething that at its worst turns people towards LARPing and revolutionary adventurism. That and getting people to do boring long term community activism and trade union work.
TLDR 1968 was over half a century ago, the '68 new left was sort of a dead end
https://www.hup.harvard.edu/catalog.php?isbn=9780674245136I would recommend 'confronting capitalism' also by chibber for a bit of a more normie broad intro
https://www.versobooks.com/en-gb/products/2705-confronting-capitalism