Chapter 1

Chapter introduction quote: Cicero, Roman statesman (106–104 BC).

“Principals of Population,” by economist Robert Malthus in 1798 (ISBN 978-0-521075930).

“The Origin of the Species” 1859 Charles Darwin (ISBN 978-0-00- 790223-1)

Jane Goodall mentioned but not referenced.

Mark Berhoff, “The Emotional Lives of Animals” (ISBN 978-1-57731-629-9) mentioned but not referenced.

Chapter 2

Chapter introduction quote: Ovid, Roman Poet (43 BC–17 AD).

Facts on animal naming and figures checked using Encyclopaedia Britannica as a reference

Sun Tzu (The Art of War) (ISBN 978-0-9811626-1-4).

National Health Service’s (NHS) website:

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