1891
ID: 1101
Social Democratic Party adopts Erfurt Program in Prussia - orthodox Marxist theory with electoral politics
ID: 1101
1891
ID: 1102
Francis Amasa Walker declares Anglo-Saxons committing racial suicide
ID: 1102
1891
ID: 1103
Nikola Tesla demonstrates wireless power transmission
ID: 1103
1891
ID: 1104
Cantor's diagonal argument proves uncountability of real numbers - some infinities larger than others
ID: 1104
1891
ID: 1105
Sergei Kovalevskaya develops theory of partial differential equations for rotating body mechanics
ID: 1105
1891
ID: 1100
May 15, 1891
Pope Leo XIII publishes Rerum Novarum on workers rights - wages must support frugal wage-earner
ID: 1100