Thanks. Wildlife is disappearing in accelerating numbers, but as the most ‘successful’ breeders on Earth, AGW human extinction is highly unlikely without a number of epidemics, cascade events, and nuclear wars. What is most threatened is the quality of life that biodiversity affords — life worth living.
We almost went extinct in 70,000 BC, but with far fewer of us to begin with we still bottle-necked through, only reaching the first billion in 1804.