What was one thing the Spanish was credited with bringing to. the new world

The spanish Brought one of the most deadliest things to the new word, Pigs

Explanation:

Pigs were very good , they populated quickly and they were an exellent source of food. But pigs carry many diseases, and they spread very quickly. The pigs also ravaged the land and destroyed many ecosystems.

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.