The cryonics movement, which started with the publication of Robert Ettinger’s book "The Prospect of Immortality" in 1964, is still treated as a curiosity by most people, though cryonics continues to gain in acceptance by both the general public, and the scientific community. Given the small number of people in suspension, and the incidents of patients lost to carelessness or accident in the past, the risk management approach to cryonics followed by the American Cryonics Society is warranted. That said, the extant cryonics organizations appear to have stability not always present in the past, and there have been no recent incidents of lost patients.