"It's a war for survival, " Brown said, sitting in a Washington office filled with piles of reports and papers about the environment.

CNN: The war over coal is personal

In such extreme conditions, there is no other way - we share a feeling that we are battling in a war for survival against nature's extreme everyday.

BBC: Surviving the worst winter in the world

It is understandable as an adult male spent a fair part of his life at war in the exclusive company of men who depended on each other for survival.

ECONOMIST: Letters

The only thing war and launching a company have in common is that both are a struggle for survival.

FORBES: Entrepreneurship Is Not War