So I say : what about love?
We feel that evolution comes down to an ability that has evolved from a previous ability...but what about the reason behind the evolution?
We are basically sedentary beings : we hold on to what works. But in all evolutions that we have verifiable evidence for, there is the evidence that someone 'loved' something enough to take something one step further.
We can see in our every day workings that we 'love' what we do, and so, put our spirit into that thing so as to take it to the next step. We become involved personally and be a part of that thing because something drives us.
We may have a home and a family and elderly parents and 'special needs' children that drives us onwards to make our life and 'their' lives better, because really, we are able to go that one step further to make it better for not only ourself, but for them also.
So what about the 'love' ?
It has been speculated that we came to our 'religious' beliefs about the dead through our dreams of the dead...that they were not really dead because we could still 'see' them, in our dreams, and hence, we saw that they lived on after they had departed. So, we care for the dead to ease our subconsciousness that we did what we could for them when they are gone.
If this is so, then what really could we imagine we could do for those that were alive?
What if the transformation of taking better care of our dead amended how better we could take care of our alive?
What if our love for those gone meant that we would treat our alive in a better way so as not to be disturbed by our dreams of the dead?
Don't forget that in all layers of society, there are all manner of peoples who play different parts in how a society works. While we can imagine a primitive lifestyle, with primitive beliefs and tools and ways of doing things, one real thing is apparent : our brain size has not changed over so many thousands of years. This can surely only mean that we definitely share the same emotions as our very primitive ancestors.
And we are fool enough to not take notice of the living animals around us? : we see how some interact, and how they do react when one of them has passed away.
So....what if the evidence that shows 'something' occuring actually comes down to how we perceive that 'thing' according to a modern day thought?
What if we looked at any evolutionary trait as being not just from a mistake or learning or understanding or discovery, but rather that 'we' felt more to make something be better than what it was?
What if we felt more about something that we went that extra step forward because we were inspired to go that extra step forward....It is not all to do with how we perceive ourself against our rival, but also how we are perceived among our own. And especially among those we love.