Effective stakeholder management is crucial for the success of complex projects, as it ensures that all parties' interests and influences are adequately addressed and harmonised. Traditional methods of stakeholder management, however, often fall short in adequately addressing the dynamic and multifaceted nature of stakeholder interactions within complex project environments. These conventional tools tend to be linear and static, failing to capture the evolving and interconnected nature of stakeholder relationships. This paper provides a thorough analysis of the inherent limitations associated with classical stakeholder management tools. Furthermore, it proposes a systems thinking approach as a comprehensive and robust alternative. By incorporating systems thinking principles, project managers can more effectively navigate the intricate web of stakeholder relationships, thereby enhancing the overall project outcomes and ensuring sustainable success.