Nurture is surely a component of a civilisation and may be observed if it occurs - but not the science and philosophy of a species, nor the degree to which it transcends basic animal nature. But symbology and technology may be overt, and we don't see much of this, over and above some twig action.
That big serial chain of potential single point failures is the rickety bridge now behind us, thank goodness. Not just that but 70 milliarcseconds puts rhe achieved performance close to the maximum possible.