As far as anyone who cares about baseball history is concerned, the 1920s belong to the New York Yankees.
It’s for good reason, as they played in six World Series in the decade, winning three of them, and that 1927 team could be considered to be the best of all time. Heck, in ‘27 and ‘28 combined, they went 211-97 and didn’t lose a playoff game as Ruth, Gehrig, and Co. went back-to-back. With 311 offensive WAR in the decade, they comfortably topped the second-place Giants, and in the American League alone the difference between them and second place is nearly the same as second and eighth.