In my inbox today:
I’m curious, what credentials (academic or otherwise) does one need to become a philosopher?
For the purposes of employment in a university philosophy department, a graduate degree in philosophy (usually a Ph.D. but sometimes an M.A.) is standard. Kind of like a chemist can be expected to have a degree in chemistry, or a biologist to have a degree in biology.
If you’re an off-the-books philosopher, I imagine this requirement might be relaxed.
Now, whether there are good reasons to accept the degree-linked-credentialist status quo (for philosophy or any other academic field) is a separate question. Commenters are welcome to take a swing at that if they so choose.