The conversation between human and AI assistant.
If humans stopped reproducing, what would the chain of events be, from now to the death of the last person? 
What would be the effects on society as people aged and nobody were born to replace them?
As the population aged, there would likely be an increased burden on the younger generations to provide care for their aging parents and grandparents. Furthermore, as the population grew smaller, society could experience a scarcity of resources and an increased competition for them.