Social development has become a central approach in social work practice globally, focusing on the socio-economic and structural conditions that impact families and place children at risk of separation. This approach emphasizes preventative, long-term solutions over short-term interventions, aiming to keep children with their primary caregivers whenever possible. Family preservation has garnered widespread support, with scholars advocating for interventions that address underlying issues like poverty, environmental disasters, and family violence known to be key drivers of family separation. Research indicates that most separations, particularly those related to economic hardship, can be prevented, as separation often leads to negative outcomes in children’s well-being, development, and long-term social functioning. Social development contrasts with traditional welfare models by promoting community empowerment and sustainable livelihoods rather than offering temporary relief. This chapter explores the historical trajectory of social development, examining its relevance in preventing contemporary child-family separation through protective practices. Additionally, it analyzes the challenges social workers face in implementing social development interventions and considers the impact of these issues on social work education, practice, and research. By integrating socio-economic reforms and community-focused strategies, social development offers a sustainable framework for fostering family resilience and reducing the need for child-family separation.