legally, all group marriage becomes practically impossible. At last only one couple, temporarily and loosely united, remains… even from this we may infer how little the sexual love of the individual in the modern sense of the word had to do with the origin of monogamy."
Any casual student of sociology can prove that marriage and the family have not always been what they are today. Lewis J. Morgan, in his well-known work, "Ancient Society," says:
"When the fact is accepted that the family has passed through four successive forms, and is now in a fifth, the question at once arises whether this form can be permanent in the future. The only answer that can be given is that it must advance as society advances, and change as society changes, even as it has done in the past. It is the creature of the social system and will reflect its culture."
Engels says:
