Final answer:
The official definition of the poverty line in the United States traces back to Mollie Orshansky's idea of defining it based on the cost of a healthy diet.
Step-by-step explanation:
In the United States, the official definition of the poverty line traces back to a single person: Mollie Orshansky. In 1963, Orshansky, who was working for the Social Security Administration, published an article called "Children of the Poor" in the Social Security Bulletin. Orshansky's idea was to define a poverty line based on the cost of a healthy diet.