20th-century philosophy
The publication of Edmund Husserl's "Logical Investigations" ( 1900–1 ) and Bertrand Russell's "The Principles of Mathematics" ( 1903 ) is considered to mark the beginning of 20th-century philosophy . 
<triplet> Logical Investigations <subj> Edmund Husserl <obj> author <triplet> Bertrand Russell <subj> The Principles of Mathematics <obj> notable work <triplet> The Principles of Mathematics <subj> Bertrand Russell <obj> author