I think the biggest issue I have with the singularity is that it assumes that progress is automatic.

History shows that progress is far from automatic as it is full of dark ages where civilizations crumbled and people lived in the shadow of the ruins in poverty just a few generations later.

The Industrial revolution changed that - but the industrial revolution was based on the ideas that came before it (guys, there's a reason the US was founded during the Age of Enlightenment which was preceded by the Age of Reason.) I think we're getting to the point where the ideas on which consistent progress is based are finally fading from the public consciousness.

Progress has already slowed, comparatively - when you look at the poverty-stricken living standards that the Industrial Revolution eradicated and the population explosion that followed. Leftists never put the living conditions of the industrial revolution is context - like the context that half or more the people you see in the slums would have been dead from starvation, not just living in crowded conditions, 50 years before.