this is a common trope - but Canada has lots and seems ok.
Also the USA is the poster child for this; it's arguable that without the California gold rush there would be no USA as this is what is thought to have capitalised the federal government sufficiently to impose order on the west and fight the south.
Also the USA is the poster child for this; it's arguable that without the California gold rush there would be no USA as this is what is thought to have capitalised the federal government sufficiently to impose order on the west and fight the south.