A commodity is bought in the marketplace. You pay money and you buy the commodity. If you have money, you could virtually buy any commodity.
Let's ask a question - can humanity be bought ? Is humanity a commodity ?
To understand this, let's understand the meaning of humanity. Humanity means to be a good human being. It means to have good human relationships by practising good human values. In crux, this is humanity.
When you practise good human values, you buy inner peace for yourself. The money you have to pay is human values, and the commodity you get in return is humanity.
Humanity is a commodity.