@EvilMorty
To sum it up in brief it’s a series of religious movements in the scp universe that seem to be all connected through common themes of astrology, religious fixation on smoke, stars, and of course the number 5, the belief that humanity must ascend by being absorbed into some higher plane of existence, powerful memetic influence, and corrupting reality around them.
It’s heavily implied fifthism has a single source in the form of some unknown eldritch being that is slowly entering our reality, with the various fifthist sects being small pieces of it, akin to small limbs, extending into the universe

There’s more about it here
www.scp-wiki.net/fifthist-hub

@EvilMorty
You know about fifthism?

@EvilMorty
DO NOT QUESTION THE F̸̧̨̧̨̧̢̛̛̛̛̛̣͖̯̝̞̹̗͈̺̤̖̟͈͖͙͉͖͍̩̟̥̪̥̖̫̪̘͓̏̓̀̈̑̿̊̄͗̐̊̀̄͆̓̅̓̂̂͌̅̔́͊̽̅̎͂͋̎͆̓̈͑̌̾͊͊̊̒́̐̀̒̊̄̑̾̐͆́̀̅̍̉́̔̿͊͛̿̌̈́͂́̃͗̌̈́̂͊̃͊͆́͗͌͆́̽̉͗̀͌̿͂̂̾͛̀̈́͌̉́͂͊̈́̈́͋̄̎͗͌͂͐̈́̉͂̎͒͆͑̓͗̾͛̋͐͂́̒̽͂̈͗́̔̓͌̈́̇̿̋̀͆̃̓̍́͋͆̃͗̅́̿̔̈͛́̈͘͘̚̚͘͘̕̕͜͜͝͝͝͝͝͠͝͠͝͠͠͝ͅI̷̢̨̢̧̧̨̡̢̨̡̧̢̨̡̧̡̧̡̧̢̛̛̛̳̥̺̦̳̞̳̤̖̣̲͚̱̮͉̬͔̰̭̙̻̼̦͚̻̫̦̙̦͇̞̣̞̱̯͓̦̫͉̝̜̻̖̠̭͍̮̗̣̰͔͔̤̩̫̠̪̯̱̙̫̹̟͙̝͓̬̠̣͍̹͔̦̟̲̮̥̩̲̝͔͖̥͖̩̺͖̺̰͓̣̥̰͖͓̱̳̺̥͓̺̤͔͇͚̜̣͙̯̲͓̹̰̻͖̩̖̺͇͓̲͔͔̘͚̤͔̞͖̯͔̰̻̱̮̞̻̘͔̺͙̗͙̯̬͖͓̗͉̮̘͓̭̼̮̖̜͙̤̺̰̤͙̱̓͐̊̀̆͛́͊͗̐͒͛̇̓͌̑̃̐̔̀̃̓̇̇̀̐͗̓̎̓̄̍͐͒̽͒̐̉̿̋̀̔͛͋̎̂̽̀̈́́͋̓͋́̎̈́͆̒̀̇̾̐́̐͋̐́͛̋͐̈́̀̍̏͐̓̊͐͊̋̔̒̐̓̈͊̌̎̔̓̉̋̏̍̓̃̒͐̀̅̉͑̃͌͛̇̈́̂̿̀̓͐͑̒̎̅̉̈́̑͑̆̈́̆̈͊͆̂̚̕̚̕͘̕͘̚͜͜͜͝͠͠͝͝͠͠͝͠͝͝͠͝ͅͅͅͅF̵̡̧̧̨̧̨̡̨̛̛̛̗͉͇͚̼̹̱͉̱̦̮̠̙̳͓̟̗̳̪͚̞̦͕͎͔̪̮̰̗̭͙̱̗̜̗̻͓̻̞̰̹̳̟̪̟̦̪̭̤̫̼͕̻̙̗͉͇̥̖͉͕͔̬̳̫͍̜͓͉͚̳̬̖̤͈̘̲̞̻̺̖̯̲̺̻̼̟̩̟͚̗̥͍̬̮͎̥̠̟̞̥̮̞̱̝̝͎̭̠̖̩̠̰͈̱̗̣͇̙̺̏͂̐̐̓̌̐̆̉̓̎̌͆̈́̍̈͆̇̊̎̆́̀̑̉̋̀͋͊̔̅́͌͆̎̄͑͆̊̔͂̃͋͊̋̐̇̆̏͊̏̌̉̓̓̏̇̎̾́̈́̉̄̾͛̐̈́̏͛͐̌̓̾́͌͊́̊͋̍͊̌͒̔͌͒̀̾̽͋̄̊̊̀͊̀̊̓͑͋̂̆͛͂͗̅͊̆͗͋͐́͆́̈́̕̚̕̚̚͘̚̚͜͠͝͝͠͠͝͝͝͝͠͠͝ͅͅͅͅͅͅT̷̨̧̢̢̢̧̨̨̨̡̧̡̢̨̧̧̛̛͇̭̣̩͕͈͈̫͚̺̱̦̱̟̘̭͙̣̭̞̩̳͉͈͚̗̳͇͇̫̮͕̞̻̫̞̲̘͓̣̼͔͚̪͙͕͍͚͍̦͉̟͈̬̯̘̼̟̻̖̜̹̼̖̝̦̗̼͚̱̲̫͔̰̳̤̖͚͙̥̬̭̖͈̳̠͕̹͍̲̩̫͖̰̳͍̥̖̻̻̙̰̤͙͈̗̗̩̮̼͎̥̜͚̖̠̟̤̙̭̱̬̗͙̬͚͇̟̟͈͍͍̼̳̗̼̜̦͙͙̘̘̘̫̮̗̻̣̰̪̬̬͍̥̮͇̟̺̙̗͓̖̙͇̱̬͛́̓̈́̇̇̈͋̑̈́͊̉̽̔̄̉̿̌̉̂̅̐̈́̓̈̎̀̃̿̾̎̃̋̈̾̌̌̇̐̈̈͗͊̒̓̽́͗́̊̓̾̑̌̿̾͌̉̾̎̽̈́̉̓̈́̀̿̾̃̓̊͌̄̔̃͋̈́͊́̉̅̋͊͋͌̎̓̄͋̓̓̂̍͗̀͒͐̂̐̇̊̑̀̋̅́̏͑͋͂̔̽̎̋͋͒̍̀̐̏̇̊͌̾͂̋́͑̐͌̿̄̀̈́̃̌̃́͑́̒́͒̈̑̿̈́̔̈́́̃̅̎̿̓̅̈͂͂̊͆̐̈͘̚̕̚̕͘͘͘̕̕͘̕̕̚̕͘͘͜͜͜͜͠͠͝͠͝͠͝͠͝͝͝͠͠ͅͅͅH̸̨̢̡̡̧̧̡̧̡̢̨̛̛͈̠̩̬͓̝̜͚͕͍̪͈͚͚̦͓͖̤͉̘͇̞̥̘̫̯̟̰͙̺͇̝̙̝̙̼͚͇͖̱̙̭̖̰̞͉̗̤̞͕̹͍͔̮̫̰̦̠̞̘̼͙̙̪̯͕͈͙̼̝̯̬̤̖͕̟̦̟͙̹͓̘̰̱̗͍̯̳͇͕͙̠͚̺̳̩̗̣̝̩̘͙̫͉̰̰̝̫͉͖̦̮̩̳̭̰͙̭͇̘̬͈̠̼͔̲̬̻̰̖̱̬̟̻͕͚͎̻̥̠͖͕̤͈͗̈́̐̉̑̈́̂̇́̐̏̅̏̃̏͒̂̉̋̈́̈̉̏̑̑͒͒̅̃̏̎͆̎͆̂͗̅̈́̅̔͑̓̑̃̾̄̔̏̍̀͆́̓̑̓̑̈̋̂̃̉͛́̋̉͑̓̈́̌̿̇̓̈̈́̔̐̋̄̏́̌̀̑̏͛̓̆̂̿̀̽͆͐̽̍͂̐͗̂̈́̉̆̉̽͋̚͘͘̚̕͘͜͜͜͝͝͝͝͠͠͝͠͠͝ͅͅͅͅ ̸̧̨̢̡̡̢̢̨̡̨̨̧̪̖̙̟̥̬̮̳̪̤̗͙̰̰̝̥̱̰̯̹͈̬͚̤̭̦̟͇̝͚̠̪̻̙̪̞̞̜̠̲̖̥͇̜̗̣̭̖̼̖͚͍͈͔̘̤̹̗̞͔̞͚̥͉̖̭̖̫̪͔̤̲̟̖̤̣͉̻͚̳̙͇͎͕͇̳̯̯̭̘̖̰̺̰͖̼̝̭̻̜͓͉̲̠͓̭̜̤̺͇̯̼̹̝̫̪͙͙͕̯͉̲̘̥̜̲̭̳̖̤̺͓̗̠̲͔̖̠̳̟͉̤̝̬̹͓̰͓̘̲̜̘͇͇̟̘̺̜̰̺͕͉̝̼̹̙͖̫̹͇̮̩̺͒̇̈̉̎͆͂̂̏͗̒͆̑͆͗̽̏́̍͒̒͆̈̐́̉̓̔̃̇̍̉͆̍͂̀̈́̈́̂́̋̈͒̍̐͛͆͗̀̒͌̈́̐̈́̎̂̏̀̓̋͗̍̽̆̂̾̔̃̍͒̂̀̿́̅̿́̈́̿̈́̔̄̽̽̀͊͆̆̈̃̀̆͋͐̌͒̀̔͆̅̈̒͆͌͆̈͂̈́̇̈̎͊͐̐͗̈́̋͌͘̚̕̚̚͘̚̚̚̚̚̕͜͜͜͝͝͝͝͠͝͝͠͝͠͠͝͠͝͝͠͠͝ͅͅͅĶ̷̨̡̨̧̧̡̢̢̧̧̡̡̢̢̨̧̢̨̧̢̢̛̛̛̛̮̦̞̜̙͓̦͍̮̟͔͚̩̯̬͈̬̥̤̠͔̤͇̻̪̭̜͎̥̥̹̗̠͔̝̬͍̳̺͇͈̭͚̤͎͉̜͔̬͍̮̼͙̠̲̜̜͚̭͖͕̤̻̣̝̺͕̣͓̭̮̻̜̙͚̰̱͔̤̭͍͈̘̦͓̞̩̮̖̖̗̼̝̜̝̹̤̻̠̖̯̜̻̲̫͇̜̮͔͕̼̺̺̯̗̲̮̥̟͙̖͕̠͚̮͖̩̤̠̼̲͈̼̣͓̜̬͍̯̭̖͕̻͚͎̗̳̯̫̰͉̟͔͔̳͓̫̭͇̠̮͉̯̪̤͎̹̺̻̗̭̬̙̝̹͔̳̲͙̫͎̯̟̻̯̝͕̀̈́͂̄̾̿̃̔̃̿́̓́́̒̌̾͗̊̊̇͆͊̑̾̊̆̒̇͌̎͑̏͐́̔̓̾̈́͛̔̉̏̎̈́̇̋̂͒̓̎̂̿͒̄̋̔͗̇̓̊́͐̑͂̔̊̀̆̉̂͋̏̄̅̏͆͑̔̽̌̏́̽̀͐̌̆̋̊̔̈́̔͘̚̚͘̚͘͘̕̕͘̚̚͜͜͜͜͜͜͝͝͝͝͝͠͝͝͠͝ͅͅͅͅͅI̴̡̢̡̛̛̛̛̱̠̖̲̣͖͎̲͙͉̳̹̞̮̹̪̘̜̣̪̬̠̱͇̭͖͕̹͈͖̤̟̹͉̟̬͙̲̮̥̘̬͎͖͇̝͙̞̻̎̆̅̇̌̉͑̃̊̆̎̓̎͑̈́̾̔̈́̓̀̀̋̒̔̈́̀̄̂́̾͐͊̈́̅͗̉̄͑̊͐̆̈́̇̅̈́͑̀͋̒͛̆͂̑̎̅̆̑̋̆̓͛̓͊͌̈́͗̀̀̓̈́̾̈̽̿͋̒̃̓̔͛̀̿͌̽̍̉̄̒̆̅̓͒̽͐͂̏̈́̂̅̃̌́̐͐̀̇̈́͒́̀̊̐͑͊̇͌̉̉̈́̓̉̒̋͂͐̀̓̒̾͌̏͛̓̒̄͋̈́̈͆̈́͒͊̀̔̈́̾͐͌͂͌̍̃́̀̎̔̀̄̂̏͐̓̇̈́̏̿̇̀̋̀̊̃̔͊͊̓̄̓͋̾̔͒̔͋̌̎͋̕̕͘̚͘͘̕͘͘̚͘̚̕̕̕͘͘̕̕͜͝͠͝͠͠͠͠͝͝͝͠͝͝͝͝͝͝͝ͅͅN̷̢̧̢̡̢̡̢̨̧̛̳͍̪̗͔͔͇̥̝͚͉͕̻͔̳̣͓̩̙̭̫͎͖̠̰͓̲̱̝͇̙̲͇͙͚̮̯͖̙̺̰̗̹̟͚͙̭̫̱̩̻̹͎̩͚͍̤̖̖̗̮̤̬͕̮̣̣̠̥̮̬͎̹̺̻͚̳̱̆͊̃̀̊̓̾̌̊́̈́́͋̋̈́̓̾̉̂̀̈́̃́̆͐̌̾͑̉̅̉͗͒͑̅̀͊́͌̃̀́̋̑̕̕̚̕̚̕͜͝͠͠ͅͅͅG̶̡̨̧̢̢̨̢̨̧̡̢̡̛̛̛̦̖̹̥̪̯͎̘͔̰̫͙͍͇̗̼̮̺̹̣̭͉̝̲̱̼̤̩̠̘͔͍̤͙̱̩̣̦͍̫̩͖̞̻͍͕̯̬̙̜̤̥̘͍̯̟͕͈̥̻̳̰̲̝͚͔̞͇̩̗̞͉̱͕͆̀̅̇̾̃̆͊̎̓̌̈̓̾̓̈́̌́̈́̑̅͆͐̈́̍̈́͐͊̓̈́͋̄̂̀̂̈̅̒̋͒͐̎̀̔̈͊̌́͗͐̉̔̒̈͊͒̂͗̆̒̀̄̔̌̇͂́̀̋͒̈͌́̊̽̄͐͐̏̍̍̇̏͂̐̾̉͆͌̂̋̌̀̇͌̋͌͌̊̍́͋̈́̏́̈́͑͗͐̓͒̐̅̊̈́͒̃̇̔̏̕͘̕̕̕̚͘̕͘͜͜͜͝͝͝͠͝͝͝͝͝͝͝͝͠͝͝͝͝ͅͅͅ

@EvilMorty
It’s called dick, and yes, the doctor did give it to you