Complex interdependence has emerged as multiple channels that establish relations and agendas between states that involve public, private and NGO stakeholders to resolve issues and take a state towards a development path. This article argues how development policy establishes complex interdependence and also increases bilateral relationships. The development theory and economic interdependence evaluate the economic and social conditioning of developing countries in the shadow of complex interdependence; the role of international development assistance needs to understand the interest of developed countries in international relations. The theoretical analysis also compiles the term well-being including human development, health, quality of life, political freedom, social rights, and wealth. These terms are the centre point of well-being, which consists of happiness and health as subjective matters. As the importance of development is stressed by Holtz and Sen, both emphasise the well-being of the population, which must need to address the component of development for the eradication of poverty.