I don’t know what is in the food pyramid at the moment, so I cannot comment on that.
But I do know that it should be about 55 percent long chain carbs and about 30 percent protein and about 25 percent fat.
Depends on whether you think our bodies evolved to handle a Paleolithic or Neolithic diet.
People (in most of the world, anyway) had no consistent access to long-chain carbs before agriculture.
The question is therefore one of how quickly we evolved physically after they became available.
A pre-agriculture diet would be much heavier on protein. Most types of carbs would be available only intermittently, not as a regular part of the diet.