The document examines the evolution and challenges of smart cities worldwide, emphasizing the shift in population towards urban areas and the governance innovations required to address ecological, economic, and social issues. It analyzes different models of smart cities, focusing on human capital, technology, and digital literacy, comparing case studies from various regions including Europe, Asia, and the United States. Main findings highlight the diversity of approaches to governance and technology adoption, and the importance of community engagement and policy implications for future smart city initiatives.