The development of father leave policies marks a critical step toward gender equality in family policy. Despite promising policy developments, father leave policies continue to face resistance and negative feedback from various stakeholders, constraining their development. Their implementation has exhibited considerable variation across countries, ranging from mere symbolic gestures to substantive reforms. This article provides a comprehensive framework for understanding their evolution, emphasising that progress depends not solely on public support but on a mix of factors, including electoral competition, policy diffusion, negative feedback, and crises. The contrasting outcomes observed in South Korea and the Czech Republic highlight how similar drivers can produce divergent policy responses, challenging the view that drivers (like crises or electoral competition) have a predictable effect on policy change. This complexity necessitates a re-evaluation of existing theoretical frameworks to more accurately reflect the intricate dynamics at play in policy development.