Robert Redslob was a German

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

-French

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 constitutional

Constitutional law

Constitutional law is the body of law which defines the relationship of different entities within a state, namely, the executive, the legislature and the judiciary....

 and public international law-scientist who was critical of the French constitution in the early twentieth century. His ideas from his work Die parlamentarische Regierung in ihrer wahren und in ihrer unechten Form from 1918 had a remarkable influence on the German Weimar

Weimar Republic

The Weimar Republic is the name given by historians to the parliamentary republic established in 1919 in Germany to replace the imperial form of government...

 constitution of 1919. In his capacity as a professor at the Hague Academy of International Law

Hague Academy of International Law

The Hague Academy of International Law is a center for high-level education in both public and private international law housed in the Peace Palace in The Hague, The Netherlands...

, he introduced the concept of heimat

Heimat

Heimat is a German word that has no simple English translation. It is often expressed with terms such as home or homeland, but these English counterparts fail to encapsulate the true meaning of the word.-The meaning of Heimat:...

in relation to international law in 1931.