We nearly all agree that some freedom of expression is necessary. It is necessary to provide self-fulfilment as the expression of our thoughts and feelings is part of our humanity. Freedom of expression is necessary in order to understand diversity and differing perspectives and so to resolve conflict. We need freedom of expression in order to be able to determine which ideas are the closest to the truth; competition between ideas is needed to bring out all the relevant facts and arguments on any issue so that the most rational explanations can win out.