Long before Sigmund Freud tackled the subject, analytical scientific minds agreed that love was basic to the human experience. But their rational brains also deemed that evaluating, classifying, and defining romantic love was impossible and therefore a waste of time and money. Freud went to his deathbed declaring, "We really know very little about love."
His dying words remained the scientific doctrine.
At least until the early 1970s when a pioneer-spirited band of social psychologists took up the scientists' constant cries of why? and how? They began asking themselves—and everybody they could lure into their laboratories—questions about romantic love.