1) Mankind is human beings considered collectively. ex: This is for the good of mankind 2) Humanity is the quality or state of being human or the totality of human beings ex: I have lost my faith in humanity 3) Human being is a noun which just means a person, or a human (ie. woman, man, child) ex: She's a very kind human being.

Hey there! I'll try to explain the difference to you: 1) Mankind = this word equals to ''all of the living human inhabitants of the earth'' = human beings collectively without reference to sex (it means, in brief, the human race). Example: ''Will there be mercy upon mankind?'' 2) Humanity = the condition or quality of being human. Example: ''His speech showed great humanity!'' 3) Human being = equals to ''a human'', a person. Example: ''We are all human beings!'' Hope that helps!

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