The word for today is…
multilateralism (adj) – 1. Having many sides.
2. Involving more than two nations or parties
Source : The Free Dictionary
Etymology : Multilateral. also multi-lateral , 1690s, in geometry, “having many sides,” from multi- + Latin latus (genitive lateris ) “side”. Figurative use by 1748. Meaning “pertaining to three or more countries” is from 1802.
