Why are flags so similar?

There are no international flag design rules, so why are national flags so similar? ### Notes ### There are a few more specific reasons for similar flags, but I do hope this video serves as a decent answer to the question in my own words. ### Sources ### "Look Busy" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ "Long Road Ahead" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/b... Learn more about your ad choices. Visit megaphone.fm/adchoices