An article in the leading newspaper of Spain is discussing the idea that Putin is the world’s most powerful leader as a very wide-spread and commonly accepted one. The article’s author agrees with this belief but points out that Putin’s power will not be long-lasting.
Be that as it may, today nobody even doubts that Putin is the most powerful leader in the world. As the Russians say, a holy place will never remain empty. When the US steps back, somebody has to step forward, and the likelihood it will be somebody better is pretty much nil.