 Complete the following phrase:  Henry David Thoreau and Ralph Waldo Emerson made major contributions to American thought. Members of the Transcendentalism movement, they emphasized the importance of the natural world and emotion to humanity. Although significant opposition to abolitionism existed early on in Massachusetts, resulting in anti-abolitionist riots between 1835 and 1837, opposition to slavery gradually increased in the next few decades. Famed abolitionist John Brown moved to the ideologically progressive town of Springfield in 1846. It was there that Brown first became a militant anti-slavery proponent. In Springfield and in Boston, Brown met the connections that would both influence him, Frederick Douglass and Sojourner Truth in Springfield, and later fund his efforts, Simon Sanborn and Amos Adams Lawrence in Boston, in Bleeding Kansas and 