Maslow's hierarchy of needs outlines 5 levels of human needs: 1. Physiological needs like food, water, sleep, and sex which are required for human survival. 2. Safety needs which involves feeling secure in one's environment and shelter. 3. Love and belonging such as friendship, family, intimacy, and sense of connection with others. 4. Esteem needs encompass respect from others and feelings of self-worth and achievement. 5. Self-actualization refers to achieving one's full potential and creative activities that provide a sense of fulfillment.