Well, one of the most famous disciple of Seneca, was Nero (yes the infamous emperor)... As long as you believe that there is such a thing like a "Personal operating system", it's a long way to understand stoicism. If you really spend a lot of time reading Seneca and Marcus Aurelius (I don't encourage you to do so, I did because I learned latin as a teen ) you'll realize that these writings are deeply connected to the context of the first century in the Roman Empire. Many of these thoughts have percolated through Christianism, that's why they're able to reach most westerners today, but remember that stoicism has failed to change romans, both individually and as a society.