This textbook examines human development and behavior across the lifespan through the framework of social work theory and practice. The authors, Charles H. Zastrow and Karen K. Kirst-Ashman, utilize a chronological approach, dedicating chapters to biological, psychological, and social impacts at various life stages. The text emphasizes strengths and empowerment, integrating current Educational Policy and Accreditation Standards (EPAS) from the Council on Social Work Education (CSWE). It covers theories within the context of family, organizational, and community systems.

This text is presented as a core resource for social work education, specifically designed to align with current accreditation standards. Its focus on a lifespan perspective, combined with an emphasis on strengths and empowerment, suggests it aims to provide students with a comprehensive understanding of human behavior within various social contexts. The integration of theoretical frameworks with practical application indicates its utility for aspiring social workers.