Thanks From my point of view there are differences and parallels between the two concepts One parallel is that both concepts are intending a territory with a homogeneous population The difference is the concept of racial hygiene is intending a homogeneous population regarding the criterium race whatever race might be the concept of ethnically homogeneous states is intending a homogeneous population regarding the criterium ethnicity A second difference is that the concept of racial hygiene has led to more extreme forms and methods in political practice in history example the holocaust not only expulsion but also extinction of millions of people in an industrially organised process User Nov 17th 2006