Pastor Martin Niemoller in response to the horrors of the Holocaust:
First they came for the Jews and I did not speak out because I was not a Jew.
Then they came for the Communists and I did not speak out because I was not a Communist.
Then they came for the trade unionists and I did not speak out because I was not a trade unionist.
Then they came for me — and there was no one left to speak out for me.
copied from here