Instructions 20Q Game: These are similar to full games, but for quizzes larger than 20 questions it will randomly select 20 questions from within the set. This is a quick way to get in some studying of a topic.     
Identify the following philosopher:

(1806-1873) British philosopher and political economist. Dubbed "the most influential English-speaking philosopher of the nineteenth century". His conception of liberty justified the freedom of the individual in opposition to unlimited state and social control.
John Milton
Jean-Paul Sartre
Democritus
John Stuart Mill