The US population today is twice what it was in 1960. I know I am oversimplifying, but so much of the the history of long term growth could be intepreted as old

The US population today is twice what it was in 1960. I know I am oversimplifying, but so much of the the history of long term growth could be intepreted as older people benefitting from progressively larger younger generations. More people = more production and more consumption = growth. I really wonder if this is sustainable with the projected future of population decline.