"Even in the area of warfare, for which men had been paying price in terms of loss of life and limbs in thousands and millions since the dawn of civilization, they have smartened. They developed matured political system and technological advancements. Most differences of nations are now sorted out by diplomacy and political means. War machines have become precise and sophisticated to hit the enemy target with minimal harm to fighting force and causing little collateral damages."
"People used to think that more population was bad for growth. In this view, people are stomachs--they eat, leaving less for everyone else. But once we realize the importance of ideas in the economy, people become brains--they innovate, creating more for everyone else."