19th-century philosophy of complexity from mathematics, astronomy, physics, chemistry, biology, and a new discipline called "sociology", which is the study of the "dynamics and statics of society". The American philosophers Charles Sanders Peirce and William James developed the pragmatist philosophy in the late 19th century. The twilight years of the 19th century in Britain saw the rise of British idealism, a revival of interest in the works of Kant and Hegel. Transcendentalism was rooted in Immanuel Kant's transcendence and German idealism, led by Ralph Waldo Emerson and Henry David Thoreau. The main belief was in an ideal spiritual state that 'transcends' the
History of Tanzania become Tanzania. A part of the Great Lakes region, namely the western shore of Lake Victoria consisted of many small kingdoms, most notably Karagwe and Buzinza, which were dominated by their more powerful neighbors Rwanda, Burundi, and Buganda. European exploration of the interior began in the mid-19th century. In 1848 the German missionary Johannes Rebmann became the first European to see Mount Kilimanjaro. British explorers Richard Burton and John Speke crossed the interior to Lake Tanganyika in June 1857. In January 1866, the Scottish explorer and missionary David Livingstone, who crusaded against the slave trade, went to Zanzibar, from where