“Freedom is not merely a word or an abstract theory, but the most effective instrument for advancing the welfare of man.”
Message to the Inter-American Economic and Social Conference at Punta del Este, Uruguay (5 August 1961) http://www.presidency.ucsb.edu/ws/?pid=8271
1961
Help us to complete the source, original and additional information
John F. Kennedy 469
35th president of the United States of America 1917–1963Related quotes

“The vote is the most effective and merciful instrument that man has devised to manage his affairs.”
Martí : Thoughts/Pensamientos (1994)
Source: An Introduction To Probability Theory And Its Applications (Third Edition), Chapter V, Conditional Probability, Stochastic Independence, p. 132.

Osborn v. Bank of the United States, 22 U.S. (9 Wheaton) 738, 866 (1824)

Source: The Dance of Life http://www.gutenberg.net.au/ebooks03/0300671.txt (1923), Ch. 2

"The Methodology of Positive Economics" (1953)

Quote of Ball in his Byzantinisches Christentum (Byzantine Christianity), 1923, p. 107; as quoted by Debbie Lewer in 'Papers of Surrealism Issue 6 Autumn 2007', p. 6, note 16
after 1916

1950s, The First and Last Freedom (1954)