Desertion of the aged, the sick, the deformed or crippled, the helpless, or of infants and children by parents, family groups, or communities is a time-rooted practice among many peoples. Technically, abandonment refers to the desertion of the aged and helpless, while the abandonment of infants left to perish is termed exposure. The basic causes of abandonment have always been economic, that is, the lack of food or the uselessness of the aged or handicapped to the group.
The growth of foundling homes in China, France, Cuba and other parts of the civilized world show that today most infants are abandoned in the hopes they will be picked up; leaving children in railway stations or railway station lockers still occurs. Some South African tribes take their old people into the wilderness and leave them in a small enclosure with a little food and water; Melanesians either burn or bury alive their elderly.