Friedrich Ratzel

>     Friedrich Ratzel (August 30, 1844 – August 9, 1904) was a German geographer and ethnographer, notable for first using the term Lebensraum ("living space") in the sense that the National Socialists later would.



> Theory of ratzel : 

                                
                                    

It was theorized in 1897 by Friedrich Ratzel, a nineteenth-century German geographer and ethnographer. The name “organic theory” comes from Ratzel's assertion that political entities, such as countries, behave in a way not too dissimilar from that of living organisms.

                                
.> Founder of modern geography : 

         
                         
He was a pioneer in developing the school of anthropogeography and was the founder of modern political geography. He emphasized the importance of physical environment as a factor determining human activity.