What discovery improved the quality of life for homo erectus?

Homo erectus is the extinct species of an old-fashioned human which is also called “upright human”.

The discovery that improves the quality of life during the era of Homo erectus is the fire. Homo erectus master the control of fire and the widespread of how the fire will be used.

they thoght they were going to nuke each other

i'm asking the same thing i asked this other cat all of