Do Sigmund Freud, Lewis H. Morgan, and Friedrich Engels have a unified conception of what it means to use science in evaluating the deep past?

Question 5:
Do Sigmund Freud, Lewis H. Morgan, and Friedrich Engels have a unified conception of what it means to use science in evaluating the deep past? What is shared between their ideas and what is different?

Freud:
Sigmund Freud, Totem and Taboo (1913), chapter 1. (I. The Horror of Incest)
PDF pg. 10-27 — BOTTOM OF PAGES pg. 1-17)
PDF OF TRANSCRIPTIONS: WEEK 8, LECTURE 13 10/25

Sigmund Freud, Totem and Taboo, chapter 4. (IV. The Return of Totemism in
Childhood)
PDF pg. 110-171 — BOTTOM OF PAGE #’s pg. 100-161)
PDF OF TRANSCRIPTIONS: WEEK 8, LECTURE 14 10/27

Morgan:
L. H. Morgan, Ancient Society (1877): Table of Contents, v-viii, 343-357, 523-527.
(PDF pages & BOOK are the same)
PDF OF TRANSCRIPTIONS: WEEK 6, LECTURE 10 10/13

Engels:
Friedrich Engels, The Origin of the Family, Private Property, and the State (1884), 35-38, 51-115, 195-217. (pages of ACTUAL BOOK)
PDF pg. 4-6 (first 2.5 paragraphs of pg. 6), 13-44, 86-96
PDF OF TRANSCRIPTIONS: WEEK 7, LECTURE 11 10/18

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