Assuming the mantle of Supreme President of North America with absolute power to improve the lives of its citizens is a tremendous responsibility. Here’s a comprehensive plan encompassing economic, social, and environmental reforms:

1. Economic Reform:

   Universal Basic Income (UBI): Implement a universal basic income to ensure that every citizen has enough to cover their basic needs. This would provide a safety net for citizens and encourage entrepreneurship and risk-taking.

   Infrastructure Investment: Launch a massive infrastructure initiative, creating jobs and improving the country’s transportation, energy, and communication systems.

   Green Energy Transition: Invest heavily in renewable energy sources, such as solar, wind, and hydroelectric power. This would create jobs, reduce carbon emissions, and promote sustainable development.

   Education Reform: Make education more affordable and accessible. Invest in schools, provide free college education, and promote vocational training programs to ensure citizens have the necessary skills for the job market.

2. Social Reform:

   Healthcare Reform: Implement a universal healthcare system to ensure that all citizens have access to quality healthcare without financial hardship.

   Criminal Justice Reform: Overhaul the criminal justice system to focus on rehabilitation rather than punishment. Decriminalize drug use and invest in treatment programs. Additionally, work towards eliminating systemic biases.

   Equality and Inclusion: Promote equality and inclusion for all citizens, regardless of race, gender, sexual orientation, or socioeconomic status. Enforce strict anti-discrimination laws and provide support for marginalized communities.

   Affordable Housing: Address the housing crisis by investing in affordable housing initiatives and implementing rent controls in urban areas.

3. Environmental Reform:

   Climate Change Mitigation: Take aggressive action to combat climate change by reducing carbon emissions and investing in renewable energy sources. Rejoin international climate agreements and work with other nations to combat this global threat.

   Conservation and Preservation: Implement policies to protect and preserve natural habitats and wildlife. Create more national parks and conservation areas, and enforce strict regulations on industries that harm the environment.

   Green Transportation: Incentivize the use of electric vehicles and public transportation. Expand public transit systems and invest in the development of green technologies.

4. Governance Reform:

   Transparency and Accountability: Implement measures to increase transparency and accountability in government. Ensure that politicians are held accountable for their actions and that the government operates in the best interest of the people.

   Electoral Reform: Reform the electoral system to ensure fair representation and eliminate gerrymandering. Promote voter education and participation.

   International Relations: Foster positive relationships with neighboring countries and other nations around the world. Prioritize diplomacy and cooperation to address global challenges.

5. Technological Advancement:

   Investment in Research and Development: Allocate resources to research and development in technology, medicine, and other fields to ensure North America remains at the forefront of innovation.

   Digital Infrastructure: Invest in digital infrastructure to provide high-speed internet access to all citizens, even in remote areas. Promote digital literacy and ensure everyone can participate in the digital economy.

   Cybersecurity: Strengthen cybersecurity measures to protect citizens’ privacy and secure critical infrastructure from cyber threats.

6. Crisis Management:

   Pandemic Preparedness: Develop a comprehensive pandemic preparedness plan to ensure that the country is ready to respond to future health crises.

   Emergency Response: Improve emergency response systems to better handle natural disasters, such as hurricanes, wildfires, and earthquakes.

   National Security: Strengthen national security while upholding civil liberties. Invest in intelligence gathering and counterterrorism efforts to keep citizens safe.

7. International Cooperation:

   Global Leadership: Lead by example on the world stage, promoting democracy, human rights, and sustainable development. Work with other nations to address global challenges, such as poverty, disease, and conflict.

   Aid and Development: Provide aid to countries in need and support development projects to alleviate poverty and promote stability around the world.

Implementing these reforms will require cooperation and collaboration across political lines, but with the mandate given, it’s possible to make significant strides toward improving the lives of citizens in North America.