| http://thepimanifesto.com/
There are also good reasons to switch to Tau (τ=2π):
| https://tauday.com/tau-manifesto
But then, there is also Radical Tauism, proposing to switch to √(2π):
| https://cp4space.wordpress.com/2013/02/28/radical-tauism/
And of course there is the famous XKCD compromise on that matter:
| https://xkcd.com/1292/