Governments worldwide are heavily investing in fusion energy, recognizing its long-term potential as a clean power source. Early efforts were driven by military interests, but the focus has shifted to commercial energy generation. Strategies vary, with countries adopting broadly different models: government-led (China), private-led (USA), and hybrid (UK), offering lessons for future fusion development. As well as investing, governments are developing effective policies and regulation for fusion. While governments fund early research, startups offer speed, innovation, and commercial ambition. Around 40 fusion startups, often backed by major investors, are exploring fresh ideas, although their technical milestones are often delayed. Major engineering and construction firms will be needed for the commercialization of fusion. The UK’s STEP programme (Spherical Tokamak for Energy Production) is a national effort to build a prototype fusion power plant by 2040, starting construction in 2032. It is aiming to boost jobs, innovation, and regional growth and is emphasizing modular design, digital tools, and scalability.