Morgan was the first person to bring forth the definite order of human society systematically. He identified three main epochs through which human society progressed. These are savagery, barbarism and civilisation. He sub-divided savagery and barbarism again into lower, middle, and upper orders according to the progress made in the production of the means of subsistence. To him,"upon their skill in this direction the whole question of human supremacy on the earth depended. Mankinds are the only beings that may be said to have gained an absolute control over the production of food. The epochs of human progress have been identified more or less directly, with the enlargement of the source of subsistence". It would be interesting to elaborate a little more on how the human beings progressed from stages of savagery to barbarism and then to civilisation.
SAVAGERY
a) Lower stage: Human beings lived in tropical or sub-tropical forests on trees. Fruits, nuts and roots served them as food.
b) Middle stage: Human beings began to utilise fire and fish as food. The new food made them independent of locality and human movement started geographically. Human beings of this stage predominantly used crude stones as weapons.
c) Upper stage: Human beings invented bow and arrow, wild animals were added to their food, and hunting became their normal occupation. Wood vessels and utensila were also used.
BARBARISM
a) Lower stage: Human beings entered into the stage of barbarism with the introduction of pottery.
b) Middle stage: