Significant Houthi damage to a U.S. naval vessel at any point in the future could plunge Washington into warlike acts that might risk direct conflict with Iran.

This must be a very warlike planet indeed.

But, come to think of it, the owl, who was not civilized, was pretty warlike too.

In 568 C.E., according to contemporary records, warlike horse riders from the Mongolian steppes called the Avars surged into the grassy plains flanking the Danube River, in roughly the territory of modern Hungary.

Male chimpanzees are “physically quite brutal” toward females and coerce them into sex, Hare explains, which could give particularly forceful individuals more opportunities to mate and pass on their warlike traits to the next generation.