1820. 1820–1835: At least 5000 Mexicans die in Apache raids, and 100 settlements are destroyed.; 1820–1842: In the Industrial Revolution child labor was exploited more than ever, especially in cotton factories and mines.
Mid-19th century Beginning of the rise of classical Reform Judaism. Mid-19th century Rabbi Israel Salanter develops the Mussar Movement. While teaching that Jewish law is binding, he dismisses current philosophical debate and advocates the ethical teachings as the essence of Judaism. Mid-19th century