Context: They came first for the Communists , and I did n't speak up because I was n't a Communist . Then they came for the Jews , and I did n't speak up because I was n't a Jew . Then they came for the trade unionists , and I did n't speak up because I was n't a trade unionist . Then they came for the Catholics , and I did n't speak up because I was a Protestant .

Question: What is the purpose of the post ?
Options:
0. None of the above choices .
1. To teach history
2. To teach literature
3. To teach economics
Answer: 1