Step 1: Understanding the Concept:
The hierarchy of needs is a motivational theory in psychology comprising a five-tier model of human needs. Step 2: Detailed Explanation:
Abraham Maslow proposed this model in 1943.
He argued that human beings are motivated by a hierarchy of needs, and we must satisfy lower-level basic needs before progressing to higher-level growth needs. Step 3: Final Answer:
Abraham Maslow is the father of the hierarchy of needs.