Without the naval treaties, how large would battleships probably have become during the 1920s?
Short answerRoughly 45,000 tons under democratic budget pressure, with larger designs possible if authoritarian competition drove the race upward.
NotesWithout treaty limits, battleship proposals in the 1920s could reach the 50,000- to 60,000-ton range, but governments may not have paid for them. Construction would probably have stabilized around 45,000 tons while democratic states remained the leading naval powers. A later rise of dictatorships could still have pushed the competitive ceiling upward. The answer treats political economy, rather than engineering alone, as the effective limit on an unconstrained arms race.