Actually, no...
This is a common misconception. It is true that our species and ancestral species have probably eaten 'occasional' meat for at least a million years, but that pales in comparison to the long evolutionary history of our genus, which has been predominantly or completely vegetarian.
As a clue to this, it is only necessary to look at the structure of a herbivore vs that of a carnivore.
Herbivores have well developed facial muscles with a jaw joint above the plane of the molars. These allow good side to side and back to front chewing movements. The muscles used are the Masseter and pterygoids. The jaw has an expanded angle compared to carnivores, and tellingly the mouth opening is normally small compared to the head size. The teeth are broad, flattened and spade shaped. The canines are dull and short (with a few exceptions where they are long and straight for defence). Food requires extensive chewing, and the saliva provides carbohydrate digesting enzymes. The stomach can be simple of complex (multiple chambers) but always has a pH of about 4-5 (i.e. mild acidity) with food in it. The stomach capacity is always less than about 30% of the total volume of the digestive tract and the small intestine is generally longer than 10 times the body length of the animal. The colon is long and complex, and may be sacculated (that is, divided into sacs or sections). The liver in herbivores cannot detoxify Vitamin A and the kidney provides moderate concentration of the urine. The nails of herbivores are flattened or blunt (like hooves).
Carnivores on the other hand have reduced facial muscles to allow 'gaping', and a reduced angle on the jaw. The jaw is jointed on the same plane as the molars, the major jaw muscle is the Temporalis, and this allows the jaw to 'shear' (meat) with minimal side to side movement. The mouth opening is often large. The incisors are short and pointed, and the canines are long, sharp and curved. Even the molars are sharp, jagged and blade-like. Carnivores tend not to chew, but swallow their food whole, and their saliva does not contain digestive enzymes. Their stomach is short, simple and extremely acid (pH 1 or so). It comprises 60% or more of the total digestive tract, and the small intestine is only 3-6 times the body length. The colon is simple, short and smooth. The liver can detoxify Vitamin A. They often have extremely concentrated urine, and their claws are long and sharp.
In every regard, without exception, homo sapiens has the bodily make up of a herbivore.
This probably explains why those on a predominantly or entirely plant-based diet live longer.
The idea that we get 'special nutrients' from flesh, or that we need 'complete proteins' is simply not true, as I'm sure every one of the hundreds of millions of vegetarians living today can probably attest.
