Throughout history, philosophy and religion have done the most speculation on the phenomenon of love.In the 20th century, the science of psychology has written a great deal on the subject.In recent years, the sciences of psychology, anthropology, neuroscience, and biology have added to the understanding the concept of love.Helen Fisher, an anthropologist and human behavior researcher, divides the experience of love into three partly overlapping stages: lust, attraction, and attachment.Interpersonal love refers to love between human beings.
An example of this range of meanings is that the love of a mother differs from the love of a spouse differs from the love of food.
Many other languages use multiple words to express some of the different concepts that in English are denoted as "love"; one example is the plurality of Greek words for "love" which includes agape and eros.
Although the nature or essence of love is a subject of frequent debate, different aspects of the word can be clarified by determining what isn't love (antonyms of "love").
For example, compassionate outreach and volunteer workers' "love" of their cause may sometimes be born not of interpersonal love but impersonal love, altruism, and strong spiritual or political convictions.
People can also "love" material objects, animals, or activities if they invest themselves in bonding or otherwise identifying with those things.