First they came for the Socialists, and I did not speak out — because I was not a Socialist. 

Then they came for the Trade Unionists, and I did not speak out — because I was not a Trade Unionist. 

Then they came for the Jews, and I did not speak out — because I was not a Jew. 

Then they came for me — and there was no one left to speak for me.

~ Martin Niemoller (1892-1984)
Protestant pastor who opposed the Nazi regime
and spent the last 7 years of Nazi rule in concentration camps