With an invasion of Ukraine and thinly veiled threats of nuclear war, we're living on the edge of World War 3 thanks to Rupert Murdoch, Facebook, Twitter, and YouTube.

The American military may be the best in the world, but too often, it's fighting 21st-century wars with 20th-century ideas. Its foreign counterparts have an opportunity to master the wars of the future.

Let's not surgarcoat this. We will build autonomous killer robots because we have every incentive to. So let's make sure we get them right.

One of the most destructive and hardest to defend against weapons we could build would be an inert slug of exotic alloys that does its damage using nothing but speed. A lot of speed.

Would a draft really discourage more Americans from supporting wars abroad?

Internet pedants fact checking space battles like to pick on the idea of deploying fighters in space. That seems like a big mistake.

WikiLeaks' stunt is unlikely to end well for informants helping to fight the Taliban and seems designed only to boost Assange's profile.

According to some environmentalists, the worst part of war is the carbon footprint.

The only questions about whether there will be a war in space are when and what weapons will be used.