Freedom to differ is not limited to things that do not matter mush. That would be a mere shadow of freedom. The test of its substance is the right to differ as to things that touch the heart of the existing order.

Jackson U. Robert Jackson may refer to:
Robert Jackson (musician) (born 1948) British musician
Robert Jackson (politician) US political figure in New York City
Robert Jackson (scientist) (born 1949) US astronomer
Robert Jackson (guard) (born 1953) US athlete in professional football
Robert E. Jackson (born 1946) British political figure MP for Wantage (1983–2005)
Robert W.