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Deacon's position is that the evolution of human minds is mainly about the evolution of language. So for him, explaining the evolution of language (and the brain features that support it) explains much of interest about humans.

Neuroscientist Terence Deacon argues that the emergence of symbolic capacities unique to language were a key factor in the evolution of the human brain, and are a key to distinguishing human from animal forms of communication, ways of learning and brain s

Cognitive Evolution and the Definition of Human Nature. Philosophy of Science Monographs, Morris Foundation, Little Rock, Arkansas, 2000, 31pp.

Canadian psychologist, Merlin Donald, explains the evolution of humans' uniquely collective mind as he outlines his theory of the evolution of human consciousness:

What makes us human? There are at least as many answers to this provocative and searching question as there are authors of this compendium. In the various articles you will find suggestions that include the 'spirit of man', referring particularly to religion, speech and not just language, imitation and 'mimetics', cooking, high levels of cognitive ability, causal belief, that humans are symbolic creatures, innate curiosity and the desire to know, mental time travel, and the ability to read other's minds. These all have cognitive ability as a common thread and, deriving from this, high-level development of language and cultural transmission.

In its 2 October 2009 issue, Science presents 11 papers, authored by a diverse international team, describing an early hominid species, Ardipithecus ramidus, and its environment. These 4.4 million year old hominid fossils sit within a critical early part of human evolution, and cast new and sometimes surprising light on the evolution of human limbs and locomotion, the habitats occupied by early hominids, and the nature of our last common ancestor with chimps.

"Humans are sometimes said to be distinguished as "The Symbolic Species." A Research Highlights note in Nature point to the work of Addessi et al., who show that capuchin monkeys, who diverged from the human lineage ~35 million years ago, can be trained to use and assign value to tokens (symbols) for different items of food." (Deric Bownds' MindBlog)

Scientists may have solved the mystery of how human hands became nimble enough to make and manipulate stone tools.

"The best reason for believing that robots might some day become conscious is that we human beings are conscious, and we are a sort of robot ourselves. That is, we are extraordinarily complex self-controlling, self-sustaining physical mechanisms, designed over the eons by natural selection, and operating according to the same well-understood principles that govern all the other physical processes in living things: digestive and metabolic processes, self-repair and reproductive processes, for instance."

"Philosophers often use the term 'qualia' (singular 'quale') to refer to the introspectively accessible, phenomenal aspects of our mental lives. In this standard, broad sense of the term, it is difficult to deny that there are qualia. Disagreement typically centers on which mental states have qualia, whether qualia are intrinsic qualities of their bearers, and how qualia relate to the physical world both inside and outside the head. The status of qualia is hotly debated in philosophy largely because it is central to a proper understanding of the nature of consciousness. Qualia are at the very heart of the mind-body problem."

"The research in the journal Nature Neuroscience by Professor Seth Grant, Head of the Genes to Cognition Programme at the Wellcome Trust Sanger Institute, suggests that it is not size alone that gives more brain power. Instead, he found that, during evolution, increasingly sophisticated molecular processing of nerve impulses - notably by providing more connections in the brain - allowed development of animals with more complex behaviours. " (Telegraph)

"..We will no longer be Homo sapiens, but Cyber sapiens--a creature part digital and part biological that will have placed more distance between its DNA and the destinies they force upon us than any other animal ... a creature capable of steering our own evolution..."