This is obviously post 1900 but I've always wanted to see a timeline where Haile Selassie is able to start breaking the power of Ethiopia's landed classes decades earlier, like passing that progressive taxation bill in the 40s or 50s and start bringing the state under the control of the central government which basically gets the 90s reforms about 40 years ahead of schedule. Either that or the 1960 coup against him succeeds and installs his son.