The Descent of Man Volume 1 Chapter III - Comparison of the Mental Powers of Man and Lower Animals Part 2

In which various instances are observed and recounted illustrating the faculties of reason, memory, and feeling shared between man and higher animals, drawing attention to their similar instincts, emotions, and capacity for association and cautiousness. The gradual development of tool use, the origins of language, and the beginnings of abstraction and mental individuality are gently contemplated as natural continuities rather than impassable divides.