Not surprisingly, Lenard was outraged by Einstein’s article. He insisted on an apology, as he had not even been part of the antirelativity rally. Arnold Sommerfeld, chairman of the German Physical Society, tried to mediate, and he urged Einstein “to write some conciliatory words to Lenard.”21 It was not to be. Einstein refused to back down, and Lenard ended up edging ever closer to being an outright anti-Semite and later a Nazi.
