Final answer:
The main theme of "Bad Luck and Big Feet" centers on social issues, especially the exploitation of children and the resistance against oppression, using various literary elements to convey messages of knowledge reliance, injustice, and societal criticism.
Step-by-step explanation:
The main theme of "Bad Luck and Big Feet" appears to be the exploration of social issues, particularly the exploitation and mistreatment of vulnerable groups. This is evident in the references provided, such as Bester's artwork "The Missing Ones", which uses children's shoes to symbolize the plight of missing and abused children.
The emotional dialogue from a speech implies the theme of resistance against oppression, while Twain's recollection suggests the importance of relying on one's own knowledge and training. Furthermore, the extracts from various literary works indicate an underlying theme of social commentary on topics like injustice, suffering, and the critique of societal norms.