I thing world will change not because of WWW 3 , But instead of the era of Information (Internet, Connectivity & Globalization) & Democracy
On Those days, Only Kings & Queens can be Selfish, but now everybody afford to be selfish, The words like " Giving a life for Kingdom in the name of Patriotism blaw blaw ... at all won't work anymore, Even though democracy that we have today is extremely corrupted in most of the country --- No politicians were dare to wage a war just sack of his/her own ego, if 1000 solders died in a war, then that will be his/her last Term of ruling
How ever that doesn't mean Humanity will flourish --- still there will be bad people , gang violence , Physically or mentally abusing Partner/ abusing Weaker Classmates/Workmates will be keep happening ---- Physical/Mental Violence in large scale might get vanish, But there is going to be no end for Individual Abusing another Individual in small scale or personal level