Disagree. UN is a diplomacy tool, NATO is a defense organization. Entirely different goals, and if UN was a defense organization something else would have filled the void for diplomacy and you’d say UN wouldn’t be necessary.
You don’t play diplomacy with your friends. And you cannot get your enemies to sit down if you’re aiming a gun at them. The UN not having teeth is the point.
There was this game I wanted to play that required a lot of memory. My dad didn’t want to spend more money on the computer so I spent a few days hacking the bios, config.sys and autoexec.bat to make sure only the bare minimum was met with drivers for the sound blaster and the mouse loaded and enough RAM left for the game to load.
Making the game play was engineering at the time.