Passage: Francisco Suárez subdivided the concept of ius gentium. Working with already well-formed categories, he carefully distinguished  ius inter gentes from ius intra gentes. Ius inter gentes (which corresponds to modern international law) was something common to the majority of countries, although being positive law, not natural law, was not necessarily universal. On the other hand, ius intra gentes, or civil law, is specific to each nation.

Question: Francisco Suarez is known for what two subdivisions of ius gentium?
ius inter gentes from ius intra gentes