Church members come to accept the policies, practices, and teachings in their church as they drift into bondage from the brainwashing techniques used by church officials. This indoctrination is so effective that the member later denies he has been brainwashed. People who have been brainwashed never know it themselves. Humans can easily be taught to believe something that can easily be proven to be absolutely false. Brainwashing can extend to groups of people without a limit in size or scope. Millions of people were brainwashed to believe Communism was the best economic system until the truth was exposed by the fall of the Soviet Union. Cults and false religions have used these techniques with great success for centuries, and Christian churches frequently resort to the same methods. Parents of brainwashed children have engaged reprogramming experts in an attempt to rescue their children from a cult or false religion. Rescue becomes extremely difficult when the oppressed is an adult who is protected by law from outside rescuers. Many parents grew up in Christian churches that used mind control techniques, and they raise their children to receive the same indoctrination generation after generation. They live their entire lives not coming to the knowledge that they have been brainwashed.