German historian Max ____ is recognised as a founding father of sociology (5)
I believe the answer is:
weber
(Other definitions for weber that I've seen before include "100,000,000 maxwells" , "Composer; physicist" , "Unit of magnetic flux, composer" , "Composer of Der Freischutz, d. 1826" , "Carl Maria von ---, composer; Max ---, sociologist" .)