"...If we would only heed what nature teaches us we would enjoy the happiest state that humans could desire. For God has created all of us in his own image, so that we have only to look at our neighbour to see ourselves. We are one flesh. And although appearances and attitudes are very different, it is impossible to efface the unity which God has conferred on us. If only that were firmly etched in our minds, we would all be living at peace with each other, in a kind of earthly paradise. The opposite, however, is the case. Everyone around us follows his own interests and looks to his own advantage; everyone wants to lord it over others. Hence our pride, our surliness, our venom the instant we are provoked. Harshness and even cruelty abound. We are vindictive and cause no end of trouble: it is as if lightning should fall from heaven every time someone is offended. So if in the course of life we endure many difficulties, we do not have to look far for the explanation: the pain men suffer comes from their fellow men. It is, of course, true that people all have their excuses. They want nothing better, they say, than to be gentle and mild-mannered, and to show patience toward those among whom they live. But, they add, it is not possible to deny our human nature: we must hunt with the hounds, because to be a sheep is to risk becoming someone else's dinner. That, then, is the excuse usually offered by men to cloak their actions. In reality so full are they of bitterness, arrogance, and pride that they cannot abide one another. It is all the more fitting, then, that we remember the lesson which the Son of God has for us here. For although we think we are hard done by when we cannot retaliate against those who ill-treat us, he tells us that it is the peace-makers and the meek who will possess the earth...
by John Calvin
I would hope this sermon helps you to understand Calvin's perspective on the family of man and our responsibility within that community.
Ping Rnmomof7 she's the one that disagreed with me about the needy being bretheren.