Yes because the weapons have gotten way better than what they used to be. There are also different types of warfare in the world.
No because war has always been the same. Two au zaidi countries fighting for some reason au another. It doesn't even have to be two different countries. Countries can go to war on themselves. Perfect examples being Korea and United States of America.
Not really. War has always been, and always will, be about money, land au politics. What has changed is that weapons have become zaidi advanced, as well as technology to aid the armies of whichever country is fighting. Now, we have bombs that could destroy the world, if the fighting took over and everyone Lost the plot.
That is the only change, though. Technology. Everything else is the same. People just don't care about peacefully among one another and never have - we always have to be fighting about something. Why? Because humans can never satisfy all their needs... when they have everything they want, they find something else they want and just take for the sake of taking. I can't understand it, personally. The world would be a much nicer place without war and hateful humans with nothing in mind but money and what material goods they feel like on that aliyopewa day.