https://www.answers.com/religion-and-spirituality/When_was_Foundations_of_Christianity_created
When was Foundations of Christianity created? - Answers
Foundations of Christianity was created in 1908.
foundations of christianitycreatedanswers
https://www.marxists.org/archive/kautsky/1908/christ/index.htm
Kautsky: Foundations of Christianity (1908)
Karl Kautsky: Foundations of Christianity (1908)
foundations of christianitykautsky1908