Question: What did the abolitionist that Philip Henson interacted with believe?

<P0-S0>  Brown first gained attention when he led small groups of volunteers during the Bleeding Kansas crisis of 1856. <P0-S1>  Dissatisfied with the pacifism of the organized abolitionist movement, he said, "These men are all talk. <P0-S2>  What we need is action—action!" <P0-S3>  During the Kansas campaign, Brown commanded forces at the Battle of Black Jack and the Battle of Osawatomie. <P0-S4>  He and his supporters killed five supporters of slavery in the Pottawatomie massacre of May 1856 in response to the sacking of Lawrence by pro-slavery forces. <P0-S5> John Brown (May 9, 1800 – December 2, 1859) was an American abolitionist who believed and advocated that armed insurrection was the only way to overthrow the institution of slavery in the United States. <SEP> <P1-S0> Nouvelle artificial intelligence (AI) is an approach to artificial intelligence pioneered in the 1980s by Rodney Brooks, who was then part of MIT artificial intelligence laboratory. <P1-S1>  Nouvelle AI differs from classical AI by aiming to produce robots with intelligence levels similar to insects. <P1-S2>  Researchers believe that intelligence can emerge organically from simple behaviors as these intelligences interacted with the "real world," instead of using the constructed worlds which symbolic AIs typically needed to have programmed into them. <SEP> <P2-S0>  During the course of his life and careers, Philip Henson would interact with such famous 19th century persons as abolitionist John Brown, Cherokee Chiefs John Ross a.k.a. Kooweskoowe and Stand Watie a.k.a. Degataga, Tennessee and Texas Governor Sam Houston, actor John Wilkes Booth, Confederate Postmaster General John Henninger Reagan, Confederate Secretary of State Judah Philip Benjamin, U.S. Congressman from Illinois Elihu Benjamin Washburne, Union General and Transcontinental Railroad executive Grenville Mellen Dodge, New York political boss William Marcy Tweed, Medal of Honor recipient First Lieutenant "Nineveh Shaw McKeen" (1837–1890), and the ancestors of 20th century Hollywood legend Cecil B. DeMille. <P2-S1> Philip Henson (December 28, 1827 - January 10, 1911) was a scout and spy for the Union Army during the American Civil War. <P2-S2>  Upon the election of U.S. Grant to the U.S. Presidency (1869–1877), Henson became the "first Special" Secret Service Agent of the United States of America, serving until Grant's death in 1885. <SEP> <P3-S0> Philip H. Murray (1842 - February 17, 1917) was an abolitionist, journalist, phrenologist, and civil rights activist who spent most of his career in St. Louis, Missouri. <P3-S1>  He grew up in Reading, Pennsylvania where he participated in the abolitionist movement in that region. <P3-S2>  During the US Civil War he continued his work and served as a recruiting officer to help enlist blacks into the Union Army. <P3-S3>  After the war, he focused on journalism. <P3-S4>  In 1867, he established the first black newspaper in Kentucky, "The Colored Kentuckian". <P3-S5>  He later moved to St. Louis where he continued to work in journalism and as an advocate for black education and civil rights. <P3-S6>  He was also the president of the first Negro Press Association.