Question: What work is the keynote speaker at the Future of Freedom Conference in 1969 known for?

Context paragraphs:
Sameera Aziz: Sameera Aziz is a Saudi media personality, journalist, film director, producer, an ambassador of children and women by SPMUDA International, Director of UNO-affiliated Sports Body, writer, radio presenter, poet, novelist, speaker, activist, brand endorser, social worker, MC & moderator, analyst and businesswoman.  She is a Jeddah-based Saudi national and conferred the prestigious titles of 'Princess' - Royal title of Sultanate of Buayan - and 'the Great Woman'.  She is an owner of Jeddah based companies 'Sameera Aziz Group' and Sameera Aziz Entertainment, the first Saudi production house in Bollywood and India.  She is most notable as a radio presenter of her weekly show 'Marhaba with Sameera Aziz' in Asian Radio Live, which is based in the United Kingdom.  She is an elected Saudi Director of United Nations' affiliated Global Sports Federation (GSF).  She is a Chief Editor of upcoming quarterly Magazine BizConnect.  She was also notable for her work with the Saudi Gazette newspaper as a Senior International Editor in the past.  She has participated as a guest speaker and Keynote speaker in many national and international forums regarding social, expatriate, animal, and women's issues.  She is recognized as a first Saudi female Bollywood director, producer and writer.  She is also recognized as the first Saudi novelist of Urdu language in Saudi Arabia.  She is active in humanitarian work.

Ken Goldstein: Ken Goldstein, also known as Kene G and Jack Dempsey, born June 1969, is an American musician, film and television writer, producer, director and occasional actor.  He is a co-founder of Planet illogica and CEO of The Six Shooter Company and the author of the book series, "The Way of the Nerd".  Goldstein is an active speaker at conferences and festivals, universities and private and public institutions.  He has been a featured and Keynote speaker in Brazil, Australia, France and Germany.  He is also a songwriter, guitar player, performer and recording artist who often performs under the stage name Jack Dempsey.  In 2014 Ken Goldstein completed his first solo album as Jack Dempsey at Capitol Records.  The album was produced and engineered by Niko Bolas.

The Future of Freedom Conference: The Future of Freedom Conference is considered as the first explicitly libertarian conference series ever held in the United States.  Debuting in 1969, the conference's keynote speaker was Austrian economist Prof. Ludwig von Mises.

Michael Lew: Prof. Michael S. Lew (born 19 April 1965) is a scientist in multimedia information search and retrieval at Leiden University, Netherlands.  He has published over a dozen books and 150 scientific articles in the areas of multimedia search, computer vision, human computer interaction, and information retrieval.  Notably, he had the most cited paper in the highest impact multimedia research journal indexed by the Web of Science (ISI Thomson Reuters), and the most cited article from the ACM International Conference on Multimedia Information Retrieval in 2008 and also in 2010.  He was the opening keynote speaker for the 9th International Conference on Visual Information Systems, the Editor-in-Chief of the International Journal of Multimedia Information Retrieval (Springer), the co-founder of influential conferences such as the International Conference on Image and Video Retrieval (which became the ACM International Conference on Multimedia Retrieval), and the IEEE Workshop on Human Computer Interaction.  He was also a founding member of the international advisory committee for the TRECVID video retrieval evaluation project, chair of the steering committee for the ACM International Conference on Multimedia Retrieval and a member of the ACM SIGMM Executive Committee (the highest board of the SIGMM) .  In addition, his work on convolutional fusion networks in deep learning won the best paper award at the 23rd International Conference on Multimedia Modeling.  His work is frequently cited in both scientific and popular news sources.

Ludwig von Mises: Ludwig Heinrich Edler von Mises ( ; ] ; 29 September 1881 – 10 October 1973) was an Austrian-American theoretical Austrian School economist.  Mises wrote and lectured extensively on behalf of classical liberalism.  He is best known for his work on praxeology, a study of human choice and action.

Pedram Salimpour: Pedram Salimpour is an Iranian-American physician-scientist, author, professor, entrepreneur and business executive.  He is the co-founder of CareNex Health Services, Champion Health Enterprises, and Plymouth Health, the latter of which previously owned Alvarado Hospital in San Diego.  He has served on numerous boards and is the youngest president in the history of the Los Angeles County Medical Association, a title he has held since 2014.  Salimpour is also the first two-time recipient of the American College of Physicians' Research Award.  As a keynote speaker he delivered the commencement address to the University of California, Riverside's 2008 graduating class, and gave the keynote address at the 2012 annual colloquium for the Whitehead Institute at MIT in 2012.

Keynote: A keynote in public speaking is a talk that establishes a main underlying theme.  In corporate or commercial settings, greater importance is attached to the delivery of a keynote speech or keynote address.  The keynote establishes the framework for the following programme of events or convention agenda; frequently the role of keynote speaker will include that of convention moderator.  It will also flag up a larger idea – a literary story, an individual musical piece or event.

Ramón Bogarín Argaña: Ramón Bogarín Argaña (1911–1976) was a Paraguayan writer and bishop and keynote speaker of Paraguay.  He was born in the Central Department of Ypacaraí, Paraguay on March 30, 1911 and died in San Juan Bautista, Department of Missions on November 3, 1976.  was a bishop, a writer and keynote speaker of Paraguay.

Beth S. Benedict: Beth S. Benedict is a professor in the Department of Communication Studies at Gallaudet University, advocate for the deaf, and a mentor for families with deaf children.  Her research focuses on early intervention, early language acquisition, and family involvement.  Dr. Benedict is also an advocate for the use of bilingualism in education of the deaf - incorporating the value of American Sign Language in deaf children.  Dr. Benedict advocates for deaf-hearing partnerships, avoiding audism, the importance of bilingual education, deaf culture and the use of sign language while also working as a family mentor for families with deaf children.  Recently, she was a keynote speaker for an International Deaf Studies conference and the featured speaker for the deaf education summit.  Dr. Benedict takes what she researches about deafness and education and shares it broadly by way of talks and application - for example, she has helped the Georgia School for the Deaf work on developing bilingual education in their programs.  In 2015 Benedict was the featured speaker at the Deaf education summit in Louisiana - a conference that brought together practitioners, educators, and parents to discuss local issues surrounding education of deaf children.  In this video Benedict explains how children who use sign language are not hindered in their ability to learn speech.

Don Peppers: Don Peppers (born 1950) is an American best-selling business author, keynote speaker, and an expert on the customer experience.  Peppers is a founding partner of Peppers & Rogers Group, a customer-centric management consulting firm.  He has delivered keynote presentations and executive workshops in more than 60 countries on six continents, and his books have been translated into 18 languages.

Supporting paragraphs: The Future of Freedom Conference Ludwig von Mises
Answer: praxeology