A transnational social policy perspective could extend the analyses on transnational social support and social work. Social policy and social work are being transformed by accelerating transnationalization of economies, labour markets, education, and care within an increasingly asymmetrical global context. This chapter describes the importance of knowledge translation in the production and implementation of transnational social policies. The general starting point of social work has been the national welfare state, which includes social services that are designed to meet the needs of residents within state boundaries, and are regulated and financed by institutions embedded within nation-states. The chapter focuses on social policies that are promoted by countries in the Global North, and enforced in the Global South. Currently, nation-states of the Global North are not only concerned with poverty and inequality within their own countries, but also with the social problems that extend beyond their national borders. The chapter also presents some of the key concepts of this book.