WordNet sense 1 (peacefully resistant in response to injustice):

passive

WordNet sense 2 (inclined or disposed to peace):

peaceable, peace-loving

WordNet sense 3 (disposed to peace or of a peaceful nature):

pacific

WordNet sense 4 (idyllically calm and peaceful; suggesting happy tranquillity):

halcyon

WordNet sense 5 ((of groups) not violent or disorderly):

law-abiding

WordNet sense 6 (devoid of violence or disruption):

orderly