Human Didn't have enough idea about evolution before 1800 century. Because, that time was only the beginning of evolutionary theory. At the beginning of 19th century scientist had made random investigation on evolution theory. Some of the scientists suspected something on evolution theory also. One of them was Charles Darwin- a famous British scientist -with his unproved theory. But the first theory in evolution was given by a French scientist called “Lamarck”. His theory was imaginary & known as "the inheritance of acquired characteristics."