Against the Hammer and Sickle
In the Communist Manifesto, Marx and Engels give 5 examples of proletarians: doctors, lawyers, poets, priests, and scientists - in that order. Of course, he doesn't claim that these are the only kinds of proletarians - they're just the only ones that he names. It's interesting that, today, people tend to think that, in Marx's class analysis, such people are often thought of as "petit-bourgeois". This is quite wrong. (Perhaps a doctor who owns his own practice would be petit-bourgeois, but a doctor, who, let's say, works in a hospital - even if she is head of surgery - would be proletarian.) "In countries where modern civilisation has become fully developed, a new class of petty bourgeois has been formed, fluctuating between proletariat and bourgeoisie, and ever renewing itself as a supplementary part of bourgeois society. The individual members of this class, however, are being constantly hurled down into the proletariat by the action of compe...