Why did people invent Hades?

Hades, as a concept and deity in ancient Greek mythology, was invented to personify the underworld and the afterlife, providing a framework for understanding death and what lies beyond. It served to explain the natural cycle of life and death, offering a place for souls after they left the mortal realm. Additionally, Hades represented the inevitability of death, allowing people to confront their fears and beliefs about mortality, while also highlighting the importance of proper burial rites to ensure safe passage to the afterlife.