Agnosticism
A word that originates from Greek roots and means "doesn't know"; translating to mean "doesn't know" whether or not a God exists. Agnosticism rose to fame in 1869 through T.H. Huxley. People who claim Agnosticism believe there is not sufficient proof on either side to prove or disprove an existence of a higher being of God status. Agnostics typically believe that humans will never know if there is a God, or there may be sufficient proof when humans reach a certain level of ascension, or they simple don't care one way or another.
Conversion Difficulty: Easy
Simply believe to convert
Time Consumption: Light
No rituals or ongoing time involvement beyond your own contemplation
Cost to Participate: Little
No collection plate or dues
Deities: None
Literature: None officially; many books published on the subject
Location Practiced: Worldwide
Afterlife: None officially recognized
Congregation: Over 100 million
Meaning of Life: None
Famous: Mark Twain, Warren Buffet, Carrie Fisher, Neil Peart, Sean Penn, Brad Pitt, Sting, Stanley Kubrick, Clarence Darrow, Albert Einstein