Timeline HS AveryCole By ermcdonald 1760 industrial revolution dates: 1760 to sometime between 1820 and 1840. 1820 Urban density became an issue 1820-1840 1850 The need for affordable housing, food, and other necessities, including medical care 1870 Rapid industrial growth 1870-1900 1900 Orphanages were needed 1900 1914 World War 1 Jul 28, 1914 – Nov 11, 1918 1930 The Great Depression 1930 Mar 4, 1933 The New Deal 1933 1935 Social Security Act of 1935 1935 1950 Mental Health Hospitals 1965 Head Start