I have recently jumped on the instinct bandwagon and have been attempting to make it fit into my own progressive theory's of evolution.
The development of instincts is a way for the process of evolution to program into the code of life, the modes of survival particular to a static environment. Its a dance between nature and nurture, whereabout an eternal process of building and maintaining optimal living under static conditions; will be countered with changing environment which forces the DNA to compromise its structures and evolve to survive.
When the environment changes to such a degree where the instincts are no longer able to cope, then evolution jumps into action. Animals when faced with starvation, or malnourishment will actually activate a survival mode that is embedded into the DNA, which will begin to trigger epigenetic changes that mark a desperate attempt to reprogram the code of life to adapt to the change in environment. (Life will find a way)
If the animal is successful, then new instincts will form a new way of life that can be maintained in the new environment,:until the force of nature once again changes things up. Its an eternal dance, that is as beautiful as it can be horrid. It often takes most of a species dieing of through mass starvation or predation, before the Mechanics of survival will kick in and produce the necessary adaptions need to perpetuate life in a changing environment.
Without choice instinctive living cannot be maintained and evolution must step in to cull off the weak and force the strong onto a different mode of living. That being said, us humans have the advantage of being able to maintain a certain diet no mater what the weather is doing; and thus are able to buck the system, but this by no means makes us free of the process of evolution, nor does it give us the ability to go against instinct without consequence.
I have been doing some thinking about my own craven impulses since becoming 100 percent raw and what I have experienced is unbelievable by most standards. I will have a freezer full of meat and fat( and yet last night for example) I had the strongest craving for fresh fish, so I had to drive to a store kind of out of the way to get what I wanted. I have found that I will get these cravings all the time, sometimes its for bone marrow, other times its for liver or eggs. I will go through great links to satisfy my cravings.(to the point of bankruptcy) When I couldn't get the tuna I wanted I settled for some other type of fish. I will often be without something I crave and just make due with the next best thing.
Before this diet I had no Idea what to do as far as choosing between the lesser of evil foods: I was eatting all type of wicked stuff, like rice, beans, potatoes, dairy. There is no way for me to tell which is worse between such poor foods once the body is so overloaded with junk.
Can ones instincts protect you if all the foods that are in the environment are less than optimal to begin with?
There has to be optimal foods available in order to make the most of your instincts, otherwise you have to suffer with either the pains of pre evolution, or the emptiness of extinction.