Freest

1690, John Locke, An Essay Concerning Human Understanding, Book IV, ch.20, section 4, http://books.google.co.uk/books?id=YxwGAAAAQAAJ&pg=PA540&dq=%22should+be+the+freest+part+of+man,+their+understandings%22&lr=&num=100&as_brr=0&ei=YK51S9DhMovYMP7oqeAE&cd=1#v=onepage&q=%22should%20be%20the%20freest%20part%20of%20man%2C%20their%20understandings%22&f=false:And, however they may seem high and great, people are confined to narrowness of thought, and enslaved in that which should be the freest part of man, their understandings.
1776, Adam Smith, The Wealth of Nations, Book IV, http://books.google.co.uk/books?id=N6gYz-gMLhgC&pg=PA292&dq=%22nothing+to+fear+from+the+freest+importation%22&lr=&num=100&as_brr=0&ei=la51S-7BCJ-mNY3jpKwE&cd=1#v=onepage&q=%22nothing%20to%20fear%20from%20the%20freest%20importation%22&f=false:The small quantity of corn imported even in times of the greatest scarcity, may satisfy our farmers that they can have nothing to fear from the freest importation.
1861, John Stewart Mill, The Subjection of Women, Transaction 2001, p. 177:For my own part, however, I desire to say that I am in favour of removing, not only this, but all legal impediments whatever, to the freest choice by women of a career whether in political or civil life.