The bad news? Steve fucking Jobs still has a devoted postmortem following for no fucking reason except that people felt that cool with ipods and iphones while he was being an abusive asshole to everyone around him and stealing credit from people that actually made things. 
When have there ever been 1 billion Buddhists?
There’s like half a billion now, so there’s probably been a billion total cumulatively.
No that doesn’t count, it’s just the same souls over and over
I assumed 1B would have to revere simultaneously. Kind of like a Spirit Bomb situation.
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Spirit bombs take energy from everything including inanimate objects too, which includes dead people.
Wow that’s bs. Then why call it spirit bomb?
I think everything, including inanimate objects having spirits is a traditional Japanese belief
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Buddhism probably peaked in %age of the world population around 200BCE-1000CE, when it was spread across most of India and China. Like every religion it’s probably peaking in absolute numbers either now, or sometime in the past half century, at about 500 million.
Super hard to estimate populations far back in time, but seems quite likely more than 1/8th of the world’s population followed it at one time, at least.