Ludwig Gumplowicz

Polish sociologist (1838–1909).

Born March 9th, 1838 in Kraków. [ref]

Died August 19th, 1909 at 71 years old in Graz. [ref]

Occupations
political scientist, politician, professor, sociologist
Wikipedia

Mostly it is loss which teaches us about the worth of things. Arthur Schopenhauer