"They speak in the new Israeli documentary The Gatekeepers...
"'We are making millions of people’s lives unbearable,' says one ex-chief.
"'We have become cruel,' says another.
"'When you retire,' a third says of his job, 'you become a bit of a leftie.'"
"War is in decline worldwide, as the Harvard psychologist Steven Pinker points out in his magnificent book The Better Angels of Our Nature.
"In part, states have learnt that war rarely achieves its goals.
"In part, mass media and international pressure put the brakes on prolonged bloodshed.
"Israel now gets only brief windows to fight wars ('to cut the grass' as its army says) before the world intervenes.
"Hence its 'mini-wars' of recent years in Gaza and Lebanon....
From "January 2009 through October 2012, 422 people (mainly Palestinians) were killed in Israeli-Palestinian violence.
"That’s horrible - but it’s a far lower death rate than the homicide rate in a safer than ever New York City over the same period.
"Tel Aviv really has become a hip Mediterranean beach town with an IT boom.
"Military leaders worry that civilians are becoming less willing to sacrifice."
The Better Angels of Our Nature: Why Violence Has Declined by Steven Pinker argues:
Violence in the world, especially the western part, has declined both in the long run and in the short, and suggests explanations why this has happened.
Pinker argues that "The way to explain the decline of violence is to identify the changes in our cultural and material milieu that have given our peaceable motives the upper hand".
Among these social changes cited as bringing about the ascendancy of our "better angels" are:
1. The interconnectivity of cultures through the need for trade.
2. Increased literacy.
3. Increased urbanisation.
4. Increased mobility.
5. Increased access to mass media.
6. All of the above exposing different cultures to each other.
7. The spread of democracy.
John Arquilla criticized Pinker's book in a December 3, 2012 article in Foreign Policy.
Arquilla criticized Pinker for using statistics that he said didn't accurately represent the threats of civilians dying in war:
"The pattern of the past century - one recurring in history - is that the deaths of noncombatants due to war has risen, steadily and very dramatically.
"The number of noncombatant deaths jumped to as much as 50 percent of the 50 million-plus lives lost in World War II, and the sad toll has kept on rising ever since." 
The Better Angels of Our Nature - Wikipedia,
Six million dead in Congo's war
Vietnam War killed 3.8 million Vietnamese.