This report offers a comprehensive critical literature review of 21st-century leadership, delving into the evolution of leadership in an age of uncertainty. It begins with an introduction to the topic, exploring definitions and viewpoints from various authors, followed by an in-depth literature review that analyzes key leadership theories and competencies. The report highlights the essential skills for modern leaders, including the ability to motivate and inspire, demonstrate integrity, solve problems, communicate effectively, build relationships, innovate, shape corporate culture, and operate globally. A key component of the report is the comparison between 21st-century leadership capabilities and traditional leadership styles. The report concludes with a synthesis of the discussed concepts and recommendations for future leadership practices. The report also presents the key competencies required for leaders to succeed in the contemporary business environment and the importance of adapting to the changing needs of organizations.