Why has warfare always been part of the human story?

From biology to belief, what explains the persistence of violent conflict?

What light can this shed on humanity’s past – and its future?

There can be few more important but also more contentious issues than attempting to understand the human propensity for conflict. Our history is inextricably tangled in wave after wave of inter-human fighting from as far back as we have records.

Repeatedly humans have foresworn war, have understood its...

No one was supposed to find Sobibor ever again. In 1943, when the Nazis shut down the death camp, they destroyed the gas chambers. To cover up pits where they buried their victims’ ashes, they planted trees.

But their attempt to totally erase the camp failed. The marshy ground in an Eastern Polish river valley still held the victims’ last possessions, rusty and buried beneath the soil. From 2007 on, archaeologists dug up tens of thousands of objects on the former camp terrain. Traces in ...