As of September 2018, Leif Segerstam from Finland is the world’s most prolific living writer of what?

Good work!

Dorania, I am a classical music fan and I haven't heard of him so I guess not.

Dorania, in Scadinavian penisula yes, it will be remembered.

lily 21, true

Unbelievable! Beethoven composed 10 symphonies and that was a lot. I wonder if his compositions will be remembered in 200 years, like Beethoven's ones still are.