A protagonist’s struggle to endure, overcome, or achieve something of significance is almost always the story’s primary source of dramatic conflict. Thematic conflict is an implied battle of ideas: opposing philosophies and incompatible worldviews concerning the story's main theme.
We have: Internal & external conflict
Person vs. person (The Great Gatsby)
Person vs. Society (1984)
Person vs. nature (Moby Dick)
Person vs. Supernatural (The Lord of the Rings)
Person vs. technology (2001: A Space Odyssey)
Person vs. fate (Harry Potter and the Half-blood Prince)
Person vs. self (Hamlet)