Chained Slave Child in Zanzibar, East Africa - Late 19th Century

Source: histclo.com

Portrait of African-American Social Reformer Frederick Douglass - 1874

Frederick Douglass (1818 – 1895) was an African-American social reformer, orator, writer and statesman. After escaping from slavery, he became a leader of the abolitionist movement, gaining note for his dazzling oratory and incisive antislavery writing. He stood as a living counter-example to slaveholders' arguments that slaves lacked the intellectual capacity to function as independent American citizens. Many Northerners also found it hard to believe that such a great orator had been a slave.
Know more about him in Wikipedia

Source: Wikipedia

Little Girls with their Pet Cats - Vintage Photographs

Source: vintag.es

The New York Public Library Book Wagon - 1930's

Source: digitalgallery.nypl.org/

Traffic in Sweden switched from driving on the left-hand side to the right-hand side - 3 September 1967

Source: retronaut