I think it's understated how well the current U.S. centered alliance has worked. I've never seen a name for it (G7 Alliance, maybe?), but it's broadly Western Europe, U.S., Canada, Japan, Australia, New Zealand, and South Korea. There's no one treaty uniting all the countries, but there are many overlapping treaties and alliances, and they tend to act in concert (if you look at which countries have sanctioned Russia during the recent war, it's almost entirely this group). This group also has a massive amount of people, wealth, knowledge and productive capacity. And though the U.S. is the linchpin and definitely the most powerful member, members are free to disagree and no one member calls the shots.

It's also interesting, because there doesn't seem to be any competing power block. People talk about things like BRICS, but that's little more than a conference between countries that don't share much in common and often are rivals as much as friends.