The development of childcare policy can be understood as a process shaped by conflicts across multiple, interconnected dimensions of policymaking. Whilst existing literature often emphasises tensions between established policy legacies and emerging paradigms such as work–family reconciliation and social investment, this study introduces a multi-dimensional framework that includes conflict and negotiation processes between competing policies co-existing within the policy domain but also within policies themselves, emphasising the dynamics of self-reinforcing and self-undermining feedbacks. Our analysis reveals how efforts to resolve tensions in one policy dimension can inadvertently trigger new conflicts in other dimensions. By examining the South Korean case over three decades, we demonstrate how such interwoven tensions drive long-term policy change, offering scholars a more nuanced understanding of the complex mechanisms underlying policy evolution.