Linnaeus developed his classification system for organisms according to:. 1. A theory of descent by modification. 2. Darwin's theory of evolution. 3. Lamarck's theory of evolution. 4. Fixity of species and 5. The sequential ladder of life.

              Sequential ladder of life which means that the organisms are classified according to similarities and differences in characters.

Explanation:

                    According to the classification done by Carlius lineaus in 1853 the organisms are classified according to the similarities and differences in their characteristics and also the scientific naming of the organism and giving them specie name and generic name to an organism. In this way the organisms are classified to groups and sub groups by giving ranks in the ladder of classification.