unilateralism

noun

one-sided action

Wiktionary

noun

Etymology: Etymology tree English unilateral Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Indo-European *-mos Proto-Indo-European *-mós Ancient Greek -μός (-mós) Ancient Greek -ισμός (-ismós)der. English -ism English unilateralism From unilateral + -ism.

A tendency of nations to act on their own, or with only minimal consultation and involvement with other nations.