Please add Monroe Doctrine tech to unify the Americas

- Oceania can be unified under Pan-Asian Combine (through Great Austronesia, and Southeast Asian Union)

- Middle East can be unified into the Caliphate, and then United Arab States, and then African Union.

- South America is the poorest great countries in comparison due to its low total population and lackluster economy.

Given that we can no longer unify the world by doing the capital change schinanigans, can we get a tech to unify the Americas?