During the seventeenth century, when European fur traders arrived, the Iroquois changed from a peace-loving tribe to fierce enemies of their neighbors, the Hurons. This suggests that
a. there are consistent cultural norms driving the expression of aggression.
b. tribal inbreeding selects for aggressive behaviors.
c. economic and social competition can elicit aggression.
d. aggression is affected by innate propensities and learned inhibitory responses.
Question 2
Based on research conducted with nonhuman animals, it is reasonable to conclude that aggression
a. is not inevitable, but instead an optional strategy.
b. may be instinctive; very few species are able to suppress aggressive urges.
c. is not instinctive, but rather solely a result of learned processes.
d. is instinctive in all species except humans.
Western European red deer
European Columbine
Early in the twentieth century, when malnutrition was common, companies such as this one advertised
Average Global Temperature Rise over the Past Century