1891.
1892.
1894.
1896.
1897.
1898.
1900.
1901.
1902.
1903.
1904.
1907.
1908.
1909.
1910.
1911.
Study: Social media probably can't be fixed
(news.ycombinator.com)
1912.
Study: Social media probably can’t be fixed
(arstechnica.com)
1913.
1914.
1915.
1916.
1917.
1918.
1919.
1920.