Biological family is too small of a vision. Patriotism is far too myopic. A love for our own relatives and a love for the people of our own country are not bad things, but our love does not stop at the border.
We might hope to change the world through better, bigger programs to stop global warming, but global warming will not end unless people become less greedy and less wasteful, gaining a fresh vision of what it means to love our global neighbor.