Jonestown residents had been forced to drink cyanide-laced Kool-Aid. “It was the most miserable night of my life,” Tim Stoen, now 60, recalls.

A 1960 Wheaton College alumnus, Stoen had been an active member of First Presbyterian Church of Berkeley, California, when he met Jim Jones in 1967. Jones’s concern for the poor and minorities impressed Stoen, an idealistic civil-rights lawyer. He joined the Peoples Temple in 1969 and became Jones’s attorney.

In 1977, Stoen moved to Jonestown, the Peoples Temple commune that had migrated from the San Francisco area, to raise his son in the socialist utopia. Because of his high position in the commune, Stoen was allowed to leave on a trip to the United States. He thought his son would be well cared for at the commune during his absence. But through media accounts, he came to realize the warped nature of Jones’s plans.

The horror lingers 20 years later, but the tragedy served as a catalyst for research on the growth of aberrant groups and improved rehabilitation for ex-members. Academics and ex-members gathered November 13 - 15 in Chicago to discuss lessons learned since Jonestown.

Experts agree that cultic activity has increased since Jonestown, with anywhere between 2,000 and 10,000 groups existing today. An estimated 100,000 to 300,000 people move in and out of aberrant groups each year, and the total continues to grow.

The number of groups varies based on the definition of cult. Evangelicals identify groups outside orthodox Christianity as cults because of their aberrant religious beliefs. Secular researchers define cults by their abusive behavior; they can include political or paramilitary groups, or even Protestant churches.

The rise of such groups is attributable in part to the transient nature of society. “We’re becoming very aware of what a scattered society we are,” says Margaret Thaler Singer, emeritus psychology professor at the University of California–Berkeley. “People are very lonely.”

Although not all aberrant groups are religious, experts realize that the terror of a cultic experience can obliterate hope in a loving God.

Brenda Daeges, 29, a participant in the Jonestown conference, grew up in the Apostles of the infinite Love group in Montreal. Although not affiliated with the Catholic church, leaders dressed as nuns and priests. Daeges says the “nuns” sexually abused her, beat her with a crucifix, and tied her to a bed. “I was beaten five to six times—on a good day,” she says. In her presence, nuns strangled a stray kitten that she had befriended. After Daeges, then 17, threatened to kill one of the nuns, they allowed her to leave. Daeges has started to find help from the Wellspring Retreat and Resource Center, a residential rehabilitation center for ex-cult members in Albany, Ohio.

However, she no longer believes in God. Daeges recalls the time’s nuns tied her to a tree in nearby woods, where a bear once approached her. “I was less afraid of the bear than I was of the nuns,” she says. “The worst the bear could do was kill me.”