His political beliefs and his polemic character attracted many Polish and Italian students, making his theories important in Poland, Italy and other crown states (today Croatia, Czech Republic).
Gumplowiczeva politička uvjerenja i polemički karakter privukli su mnoge poljske i talijanske studente, čineći mu teorije važnim u Poljskoj, Italiji i inim krunskim državama (danas Hrvatska, Češka).