| Fourth Evolution: Interbehavioral History |
Evolution of acts and traits as responses to objects, conditions, and institutions. |
| Development of-stimulus and response functions. |
| Third Evolution: Ontogenetic Evolution |
Embryological development of individual organisms. |
| Second Evolution: Phylogenetic Evolution |
Evolution of organism-environment adjustments and adaptations. |
| Evolution of species, genera, phyla. |
| Development of plants, and animals. |
| First Evolution: Inorganic Evolution |
Development of the earth. |
| Evolution of planets and stars. |
| Development of chemical elements, compounds, and various chemical processes. |