Say the words “class analysis” or “class conflict” and most people will think of Karl Marx. The idea that there are irreconcilable classes, their conflict inherent in the nature of things, is one of the signatures of Marxism. That being the case, people who want nothing to do with Marxism quite naturally want nothing to do with class analysis.
So it ought to be of interest to learn that Marx did not originate class analysis or the idea of class conflict. These things have their roots in radical liberalism, or libertarianism, predating Marx’s writings.