clarification

I want to clarify my last entry. I feel, perhaps, it may have not been written as clearly as I would have liked and my intended meaning became obscured by my unclear writing.

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Since humans evolved 150,000 years ago in Africa, virtually all human interests and desires can be seen as having initially evolved at that time for a particular purpose. For example, we have an almost insatiable love of sugar and fat now, because 150,000 years ago in Africa those things weren't always easy to come by and they provided a lot of needed calories. If we had evolved in modern times we probably would find refined sugar and excessive fatty foods repulsive since they are bad for our health.

Keeping that in mind, it causes me to wonder how certain tendencies and personality types which seem entirely modern manifest themselves in the ancient past. Certain personality types, such as, 'Video Game Nerd', must have served some purpose in the far distant past, otherwise it would have never evolved. (and it clearly did not suddenly evolve within the past 50 years. Unless you believe in the 'blank slate' theory, then maybe that seems plausible to you, but I think the 'blank slate' theory has been thoroughly proven wrong).

So, clearly video game nerds must have existed long before video games. The question is, why did that personality trait evolve in the first place and how did it manifest itself in a time before electricity was even an idea. What sort of things did people who would today spend their time playing video games or designing software spend their time doing in 2000 b.c.? Of course, I am not only interested in video game people, but they are an easy example as something that has such a clearly modern manifestation without an obvious ancient one. Hope this clarification is helpful.