The last million years had comparable temperatures, you'd need to go back to 50 Myr ago to have a significantly warmer climate, and without inland glaciation anywhere on Earth.
I think that misses the point (or at least my point). Yes it was warmer then. But it was even warmer 50 Myr ago. For example one thing that sets the two periods we are discussing apart was if Antarctica had glaciers at all or not.
