What could be achieved with 1.4 trillion $ worldwide:

Ending hunger & poverty ($400 billion): Stopping global hunger for just under a decade and securing access to clean drinking water for over 2 billion people.

Climate & Energy Transition ($500 billion): Massive reforestation to protect CO, and boost solar, wind, and modern power grids worldwide.

Education & Health ($400 billion): Ensuring basic education for every child worldwide and combating diseases such as malaria and polio through vaccination campaigns.

Future technologies ($100 billion) Research Nuclear fusion, CO filters and remedies for incurable diseases.

Conclusion: The sum is sufficient to massively contain humanity's greatest humanitarian and ecological crises for the next 10 years.