Massive loss of life or economic disruption, while hugely bad, is not what a great filter means in this context. If earth's climate returns to pre-holocene gree

Massive loss of life or economic disruption, while hugely bad, is not what a great filter means in this context. If earth's climate returns to pre-holocene greenhouse gas levels, temperature and sea levels the human race would not be cut off from the stars in a fundamental way.