Our AOS for Year 11 is "Reinventions". I love it, there are so many ways you can define it.
Last year we did "Making Choices," which I've got to say I enjoyed a lot.
Um...some related texts. "Human Condition" is a hard one, for me anyway, since I don't know what areas you've covered and don't really know where to start with it.
For "Changing Worlds"...wow, broad topic! I like those.
You could tackle it from many different angles - the generation gap, sci-fi time travel, physical transformations, lifestyle changes, etc. I might come back with more specific related texts to help you.