Part XVI — Evolution, domestication, and canine history

16.1 Wolf ancestry and domestication

• Genetic evidence establishes the domestic dog (Canis lupus familiaris) as descended from a now-extinct Pleistocene grey-wolf population, not from any modern grey-wolf lineage.
• Domestication timing — most robust ancient DNA and archaeological evidence places the domestication event between 15,000 and 40,000 years ago, likely in more than one location (multiple-origin hypothesis).
• Selection pressures — the earliest selection was for reduced fear response ('tameness'); coat and morphological traits followed as correlated selection effects (see Belyaev's Russian silver-fox experiments for the mechanism).
• Village dog populations — before dedicated 'breeds', dogs formed loose landrace populations coexisting with human communities. The INDog (Part II-A), Africanis (Part II-S), and Basenji (Part II-M) preserve this pre-modern-breed genetic character.
• Modern breed formation — most 'ancient' breeds are Victorian creations (late 19th century); the modern breed concept is only ~150 years old.

16.2 Cognitive coevolution with humans

• Dogs read human gestures and gaze better than any other non-human species — better than wolves raised by humans, and better than chimpanzees on many tasks.
• This suggests the socio-cognitive adaptation to humans is genetically encoded (not just learned).
• The 'gaze bond' — mutual gaze between dog and owner triggers oxytocin release in both, mirroring the mother-infant bond.

16.3 Indian archaeological and cultural presence

• Bhimbetka rock paintings (Madhya Pradesh, ~10,000 BCE) depict dogs accompanying hunter-gatherers.
• Indus Valley Civilisation (~2500 BCE) artefacts include dog figurines; burial evidence of dog-human companionship.
• Vedic and epic literature — Sarama (the celestial mother of dogs); Yudhishthira's refusal to abandon his dog at the end of the Mahabharata is one of the most powerful dog-human bond images in world literature.
• The dog as vahana (mount) of Bhairava; as companion to Dattatreya.
• The INDog population traces continuously through Indian archaeological record; imported breeds are all recent additions.