Veterans Day History. So now that you know when Veterans Day 2015 will be celebrated, on to a bit of history. The day â November 11 â marks the end of World War I, and was originally known in the United States as Armistice Day. This changed in 1954, when it became officially known as Veterans Day.
Malthius proposed a systematic theory of population. He believed that population growth is potentially exponential while the growth of the food supply is arithmetical at best. Linnaeus is the father of Taxonomy.he classified, named and ranked the organisms. So, Darwin proposed the idea of studying humans as groups rather than as individuals. (B) Report.
Jean Piaget (. [ÊÉÌ pjaÊÉ] ; 9 August 1896 â 16 September 1980) was a Swiss developmental psychologist and philosopher known for his epistemological studies with children.His theory of cognitive development and epistemological view are together called  genetic epistemology .ccording to Ernst von Glasersfeld, Jean Piaget was the great pioneer of the constructivist theory of knowing .. However, his ideas did not become widely popularized until the 1960s. This then led to the emergence of the study of development as a major sub-discipline in psychology.