The modern diet as we know it consists of Three meals and snacks in between. Did we primarily always eat this much? Or were we built to sustain without eating over longer periods of time?
I would suggest that you consider cross-posting this to /r/AskAnthropology, as it is less an historical question than one about human physiology.
History-related question:
Is a three-meal day a modern practice? How much do we know about the dietary habits of ancient/classical cultures?
It's a very broad question, but I'm curious. Did Roman practice resemble Carthaginian, e.g.