Throughout the last century, humans have triumphed over the seemingly impossible and have overcome plague, famine, and war. Harari emphasizes that although this is difficult to believe, humankind has indeed successfully reduced plague, famine, and war from unyielding natural forces into manageable predicaments. The fraction of people today that die from communicable diseases is less than of those who die from old age; the mortality rate linked to complications from diabetes, obesity, and heart conditions is less than of those who die from having too little to eat; and the number of casualties of war is less than the total body count for suicide.
Now we must ask ourselves: What will become of humankind? With this much power at our fingertips, how will we protect the world from the self-destructive tendencies of man? We are entering the next part of evolution. We have arrived at the age of Homo Deus.