Careful with the idea that you’re a young country with limited history. Your indigenous peoples may view the matter (rightfully) quite differently.
In Australia we actually changed the lyrics to our national anthem a few years back. It did say “…we are young and free”. Which is a bit of a ‘fuck you’ to the people who have lived on and cared for the land for upwards of 50,000 years. So it’s now “we are one and free”.
I’m not chastising you, just prompting you to think about things differently.