Senicide or geronticide is the abandonment to death, suicide or killing of the elderly.
Societal views and legal repercussions have varied greatly in regards to senicide.
Van Hoof, writing in 1990, examines 87 cases reports of older people in classical antiquity who have committed suicide. Of these suicides, he claims twenty were motivated by impatience, seventeen by humiliation, twelve by vanity, and ten by suffering. Van Hoof also provides statistics for the manner of the suicide, both successful and unsuccessful. Starvation was the most widely used, accounting for eighteen of the sixty-one cases available. Suicide via the use of weapons was second most prevalent making up thirteen cases, followed by the use of poison in eleven cases. The use of various methods (seven different methods are reported in all) suggests that no particular technique was believed to be the most proper or entirely condemned. However, that Athens had a law focusing on suicide by hanging indicates that this manner of suicide was especially disdained, perhaps because the death was intimately connected with a structure that could not be easily removed, such as a tree. Thus, the act of purification, should it be deemed necessary, would be more difficult to perform.
Senicide as an institutionalized practice, however, seems to be much less common in ancient Rome and Greece. Parkin provides eighteen cases of senicide which the people of antiquity believed to happen. Of these cases, only two of them occur within Greek society, one within Roman society, and the rest falling outside of these two cultures. One example that Parkin provides is of the island of Keos in the Aegean Sea. Although many different variations of the Keian story exist, the legendary practice may have begun when the Athenians besieged the island. In an attempt to preserve the food supply, the Keians voted for all people over sixty years of age to commit suicide by drinking hemlock. The other case of Greek senicide occurred on the island of Sardinia, where human sacrifices of fathers seventy years old were made by their sons to the titan Cronus.
The case of institutionalized senicide occurring in Rome comes from a proverb stating that sixty-year-olds were to be thrown from the bridge. Whether or not this act occurred in reality was highly disputed in antiquity and continues to be doubted today. The most comprehensive explanation of the tradition comes from Festus writing in the fourth century AD who provides several different beliefs of the origin of the act, including human sacrifice by ancient Roman natives, a Herculean association, and the notion that older men should not vote because they no longer provided a duty to the state. This idea to throw older men into the river probably coincides with the last explanation given by Festus. That is, younger men did not want the older generations to overshadow their wishes and ambitions and, therefore, suggested that the old men should be thrown off the bridge, where voting took place, and not be allowed to vote.