This is a story of how humanity evolved. Time frame is 70,0000 years ago
Cause - Climate changes cause the forests to be replaced by prairies
1 Difficult to hide
2 Need to move faster
3 Transition to hunting animals in grasslands.
1 Discovery of fire
2 New tools developed
1 Eyesight replaces smell as the primary sense organ
2 Bi -pedalism helps mobility as well as multitasking
3 Consumption of cooked animal protein makes digestion easier
4 Larger groups are formed and I - My lines evolve ….different treatment for people inside the lines from those who are outside the lines.
5 Simultaneous competing and cooperation within groups and between groups
6 Ability to read intentions of other is important
7 Ability to mask intentions is also important
1 Brain size grows - triples from 500 gms to 1500 gms.
2 Intestines (digestion process is reduced) and hips narrow
3 Division of labor develops
4 Leadership based on hunting skills - not hereditary
5 Wealth - no major differences …. egalitarian societies
6 Group size grows ….. exchange of young women between groups
7 God - concept not yet developed
8 Toolmaking becomes an important skill
9 Hunting in groups - can deal with much bigger and stronger animals
10 Language grows more complex - communication skills develop