Ancient Love

Because most of us as modern people have lost the intestinal microbe, Lactobacillus reuteri, that is responsible for increasing release of the hormone, oxytocin, from the brain, are the phenomena of love, affection, and concern for other people less intense than they used to be in prior times? Was love and affection stronger, for instance, in the 19th century, the Middle Ages, or the Greek Empire? I share a unique personal experience that indelibly imprinted this question on my brain. ...