Final answer:
Post-colonialism is an interdisciplinary field that explores the enduring effects of colonialism in formerly colonized countries. It is a prevalent theme in post-colonial literature.
Step-by-step explanation:
Post-colonialism is an interdisciplinary field that explores the enduring politico-economic relationships between former colonizers and their former colonies. It focuses on the negative effects of colonialism that persist in formerly colonized countries even after independence. Post-colonial literature, such as Wide Sargasso Sea, typically addresses themes like revolution, migration, and identity in these contexts.