Multiple choice The basis of International law is: Ubi societas, ubijus Jus gentiwn Jus Cogens Droit des gens Reveal answer Fill a bubble to check yourself C Correct answer Explanation Jus Cogens (peremptory norms) are fundamental principles of international law from which no derogation is permitted (e.g., prohibitions against genocide, slavery, torture). They form the basis/boundary of modern international law.