This book expounds on the Art of Acclimatization in the characters of The Terrible Twos and The Terrible Threes by the most notable twentieth-century writer Ishmael Scott Reed. Adaptation has been connected with an evolutionary process that would enable various human beings to better live in their particular surrounding. People show flexibility to the imposed conditions according to their mindset. The process of behaving in a flexible manner improves the resilience of people to varying environments. The process of habituation and the success of characters are analyzed.