He loved his mother: doesn't that warm your silly, sentimental, twentieth-century heart? He loved his father. He loved his sister. He loved his niece. He loved his friends. He admired certain individuals. But his affections were always specific; they were not given away to all comers. This seems enough to me. You want him to do more? You want him to 'love humanity', to goose the human race? But that means nothing. Loving humanity means as much and as little as loving raindrops, or loving the Milky Way. You say that you love humanity? Are you sure you aren't treating yourself to easy self-congratulation, seeking approval, making certain you're on the right side?