Since the dawn of something

“Since the dawn of something” means the time since something began. The basics of farming have been the same “since the dawn of the agricultural age:” seeds, soil, sunshine, and rainfall. The basics of farming have been the same since the agricultural age began. “Since the dawn of time” is a common usage of this expression, and it means as long as we have known and is often not used literally. They have been dealing with this problem “since the dawn of time.”