The “only” way of accounting for the scarcity of even comparatively upright men and women is that, whereas God made man upright, they (men) have, etc. The only account to be “found” of the origin of evil, the great mystery of theology, is that given in Holy Writ (Genesis 2:1-3:24). Among man’s “inventions” was the one especially referred to in Ecc 7:26, the bitter fruits of which Solomon experienced, the breaking of God’s primeval marriage law, joining one man to “one” woman (Mat 19:4, Mat 19:5, Mat 19:6). “Man” is singular, namely, Adam; “they,” plural, Adam, Eve, and their posterity.