In one sense, the primary trendy ethologist was Charles Darwin, whose guide, The Expression of the Emotions in Man and Animals, influenced many ethologists to come back.
N'ótù uche, onye agụmàgwànụmanụ nke mbụ n'oge ugbua bụ Charles Darwin, onye akwụkwọ ya, The Expression of the Emotions in Man and Animals, metụtara otụtụ ndị agụmàgwànụmanụ n'ọdịnihu