Answer:
Today it is not possible to carry out an isolationism like the one proposed by presidents Washington and Monroe. This is because we live in a globalized world, in which the economies and policies of the countries are interconnected and dependent on each other.
Globalization has expanded the economic connections of the countries of the world. Today, international trade is essential for the development of countries, so isolationist policies are detrimental to their development.
We have as an example the case of Venezuela, which with the Chavista regime has carried out isolationist policies, and the result in 2019 is more than 5,000,000 Venezuelans fleeing their country, with inflation of 2,000,000% and 30% of their population living in poverty.