brics/eurasia is the rising power, america is the global hegemon. if american foreign policy shifts and for example, they pull out of europe/middle east/south pacific, then an arm of brics will move in. europe is too weak to be its own "pole" of global power. the "multipolar" world is one where the usa is isolationist and only influences its continental neighbors, while the old world fights till one or two powers come to a peaceful status quo (russia/china, maybe turkey or a united europe could fit in)
Canada