Probably by referral, if the organization wants to remain secret.
Added: In the case of organisations like the Masons, you can apply online and they operate more like private member's clubs.
they don't.
You don't...they're secret.
Is there a government? Yes. Are there societies that have secrets. Yes. Are there secret societies. No. If we know about them they are not secret. Are there people in the government that belong to certain fraternal societies. Of course.
Join and you'll find out.
George L. Hunt has written: 'Secret societies' -- subject(s): Biblical teaching, Moral and ethical aspects, Moral and ethical aspects of Secret societies, Secret societies 'Secret Societies (Eagle Books)'
Some secret societies have been thought to have practiced ritual abuse. Secret societies may compete for members with other established organizations. They therefore may offer something different, like wealth, power, fame, sex, drugs, security, the promise of salvation or eternal life. Secret societies within exist established secret societies
type "/join undergroundlab"
Secret Societies - 2007 was released on: USA: 15 June 2007
Arthur Preuss has written: 'A dictionary of secret and other societies ..' -- subject(s): Secret societies, History, organization, Societies
Secret societies typically operated by organizing members who shared common goals or beliefs into a hidden group that met in secret and communicated through coded language or symbols. Members often swore oaths of loyalty and secrecy to protect the group's activities and identities. These societies often employed initiation rituals to admit new members and focused on maintaining strict levels of confidentiality to protect the group's interests.
Jon Rappoport has written: 'The secret behind secret societies' -- subject(s): Miscellanea, Secret societies 'The Ownership of All Life'
The function of secret societies was to give punishment to the people and to keep the civilization running smoothly.