Everybody knows his name, everyone knows what he stood for. Everyone knows he was right.
How much of legalization he personally caused is probably impossible to say. How many people saw his resolve and took a step up?
The first few to stand up in any social change are often beaten to silence by the fearful. The population actually build their opinion on how quickly they stand back up. Once Marc had been singled out and victimized by the legal system he became a people's champion.
We will probably errect a statue in his honour, (until someone leaks his diary).
People will argue it was legislation etc but paper is never really responsible for anything, without people like Marc paper pushers would never initiate any change.