Beings with consciousness encompass all sentient beings, in addition to being self aware human being have a capacity to be compassionate, temperate, and just; generally humans have a capacity to be virtuous.
Quoted below is a stoic sage lamenting like you do (not Buddhist source i know, but i think its interesting to read. :)
Is he passionate, is he full of resentment, is he fault-finding? If the whim seizes him, does he break the heads of those who come in his way? (If so), why then did you say that he is a man? Is every thing judged (determined) by the bare form? If that is so, say that the form in wax is an apple and has the smell and the taste of an apple. But the external figure is not enough: neither then is the nose enough and the eyes to make the man, but he must have the opinions of a man. Here is a man who does not listen to reason, who does not know when he is refuted: he is an ass: in another man the sense of shame is become dead: he is good for nothing, he is any thing rather than a man. This man seeks whom he may meet and kick or bite, so that he is not even a sheep or an ass, but a kind of wild beast.
