My theory is that any sufficiently advanced self-replicating system of memes, will develop an 'immune system' to combat out of control memetic mutation. That's

My theory is that any sufficiently advanced self-replicating system of memes, will develop an 'immune system' to combat out of control memetic mutation. That's why heretics and blasphemers are burned, and ideological sedition is just as likely to expel one from any secular 'in-group'. If this didn't happen everyone would just go thinking whatever they please and and a memetic-system would die a death of a thousand schisms and cease to be as competitive in the arena of other meme systems.