John Stuart Mill 
On Liberty 

"The only freedom which deserves the name, is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs, or impede their efforts to obtain it."Few philosophers have had a greater impact on the modern world than John Stuart Mill. World leaders, political parties, and academics have all taken inspiration from his pioneering concepts. In On Liberty, Mill defended the concepts of liberalism, human rights, and utilitarianism. Applying his theories to politics, On Liberty is a magnificent examination of the nature of state and society. First published in 1859, Mill’s libertarian ideas continue to exert an incredible influence on politics and philosophy today.