„Wars will not be possible if Bitcoin is the world currency“

I struggle to argument why that would be the case.

Because.. if Bitcoin is the global currency.. or only reserve currency. Whatever. Lets imagine its the only currency on earth.

There will be still a GDP in every country. And now lets assume, usa is putting 4% of its GDP into military. While mexico is only putting 2% in military, while its gdp is already much smaller.

Now i get the point, that without the ability to print money.. war is much more stupid.. and more unlikely to happen..

But whats stopping usa to take over mexico in a bitcoin world?

Thanks.