John A. Meacham (October 4, 1944) is SUNY Distinguished Teaching Professor Emeritus at the University at Buffalo—the State University of New York. Meacham initiated the study of prospective memory, a research subject in cognitive psychology, in the early 1970s. He also argued that wisdom is a balance between knowing and doubting and that most people lose their wisdom as they grow older. Meacham edited the international journal Human Development on theory in developmental psychology; was elected a Fellow in the American Psychological Association; served as president of the Jean Piaget Society; and taught in the Fulbright program in Bosnia and Herzegovina. Earlier publications were authored as John, more recent ones as Jack.