I know most people remember Crichton as the writer of Jurassic Park, and other tales, but to me he'll always be the defender of science against the cognitive dissonance of single issue fanatics, and its corruption by the agendas of others who threaten to destroy its credibility. (Check out This Video Interview to see what I mean).
His death is a great loss to the proponents of real science. They lost a champion of their cause.