We are the most intelligent (by our own standards) and can do many acedemic tasks that other species cannot, but we are not the most successful organisms. The arthropods are way better at surviving, and lead the way for multicellular life, various parasites knock us off the top hands-down, but undoubtably the most successful of all living things are various species of bacteria, some of which have remained unchanged for three billion years.
Also, we cannot be the pinnacle, purly because there is no top to accomodate. Life is not a ladder, with us at the top: we are an insignificant twig on a branch, that will one day thicken and split into many more twigs. Or, most likely, drop off entirely.
Now that that is cleared up, back on topic.
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