Since the days of our biblical past, the people of Israel have already been a complaining hoard. Elder DSP Edric talks about the causes and consequences of constant complaining, using the Israelites as an example in Numbers 11.
When the Israelites complained about their jobs, God called Moses to lead them out of slavery. When God blessed them with the daily miracle of manna, they complained that it was not good enough. Moses was dejected and hurt when they started to complain about his leadership. Despite multiple warnings from the Lord, they walked straight into their own graves of cravings.
The Graves of Craving