Final answer:
Isolationism is when a country stays out of foreign entanglements and keeps to itself. Neo-isolationism is similar to isolationism except it still allows for a country to participate in world markets.
Step-by-step explanation:
The primary difference between isolationism and neo-isolationism is that isolationism is when a country stays out of foreign entanglements and keeps to itself, while neo-isolationism is similar to isolationism except it still allows for a country to participate in world markets. Neo-isolationism means distancing a country from international organizations that get in the way, while still participating in the world economy.