Early Proponents of the Concept of Lebensraum

[Futurist]

Other than geographer Friedrich Ratzel (who coined the term "Lebensraum" in 1901), General Friedrich von Bernhardi (in his 1911 book Germany and the Next War), Pan-German League president Heinrich Class (in his 1912 book If I Were the Kaiser), and professor Karl Haushofer (who taught Rudolf Hess about Lebensraum), exactly which other people, if any, were early proponents of the concept of Lebensraum?

Any thoughts on this?

[Futurist]

Also, to clarify--I am talking about Lebensraum in general, rather than Lebensraum in Eastern Europe in particular.

[wm]

Some of the people believed to be philosophical/ideological enablers:
Arthur de Gobineau
Houston S. Chamberlain
Felix Dahn
Heinrich von Treitschke
Paul de Lagarde
Friedrich Albert Lange
Josef Ludwig Reimer
Jörg Lanz von Liebenfels

[ChristopherPerrien]

Bismarck , talking of the need/problem to replace a growing child's pants so often. He was no proponent of "L-raum", but he saw the concept and the issues it would create.

[Futurist]

Bismarck , talking of the need/problem to replace a growing child's pants so often. He was no proponent of "L-raum", but he saw the concept and the issues it would create.

Didn't Bismarck believe that Germany was a "saturated" country, though?

[Futurist]

Some of the people believed to be philosophical/ideological enablers:
Arthur de Gobineau
Houston S. Chamberlain
Felix Dahn
Heinrich von Treitschke
Paul de Lagarde
Friedrich Albert Lange
Josef Ludwig Reimer
Jörg Lanz von Liebenfels

Thank you very much for sharing all of these names with us! Also, do you know of any other relevant people in regards to this?

[Piotr Kapuscinski]

Thomas Jefferson maybe?:

https://en.wikipedia.org/wiki/Manifest_destiny