Just a query; For Changing Worlds (Out of curiosity. I do Changing Self.), do you have to cover change on a science-fiction level, or is any sort of changing society good?
If the latter is the case, I think that Orson Welle's 'The Magnificent Ambersons' (Or the original novel, which I haven't read.) would work as a piece of related material for this topic. The best thing is that it would work on two levels;
1.)The change depicted within the text itself (Industrialisation and it's effects upon the Ambersons, left behind with the change of the 'horseless carriage'. Indeed, the film's relation to change is enhanced by Welles' use of silent film techniques such as the famous iris-out shot when the automobile is driving away.)
2.)The surrounding context. The Magnificient Ambersons is best-known as as a 'lost' film, seeing 60 minutes of footage was trundicated and destroyed, with more 'uplifting' scenes filmed by another director being placed into the film following a negative response to initial test screenings. At the time, the loss was thought so minimal that the 'lost' footage was melted down for it's silver nitrate content. Now it is viewed as a tragic decision, which is indicative of a change in the societal perception of film, Orson Welles, and economic policy, among many other things.
Would that work?