Human flourishing is a fundamental goal of most societies, and various theories have approached this concept, including the International Classification of Functioning, Disability, and Health (ICF), the job demands-resources (JD-R) model, self-determination theory (SDT), and the integrative model of behavioural prediction (IMBP). These theories focus on different aspects of well-being and the factors that influence an individual’s ability to lead a fulfilling life. This chapter aims to explore the capability approach (CA) and examines how it complements and connects with these existing theories. This chapter demonstrates how, by emphasising the importance of individual capabilities and human agency, the CA broadens the applicability of these theories. Unlike classical models that focus primarily on analysing situations, the CA highlights the broader context, aiming to enhance flourishing by considering situational determinants and the impact of contextual factors on an individual’s ability to make meaningful choices. This chapter contributes to a more nuanced understanding of human flourishing by illustrating the synergies between the CA model and other theoretical models. It argues that to be truly comprehensive and effective in the real world, theories must embrace the transformative potential of the CA.