We live in a culture that discourages empathy. A culture that too often tells us our principle goal in life is to be rich, thin, young, famous, safe, and entertained.
For the moment a lot of attention is given to economic concerns, and these problems at hand easily eclipse all others. But the remedies proposed for these problems all come out of outmoded ways of thinking... The remedy? Compassion. The logical feeling that we find in ourselves if we search deeply enough that has to be exercised toward all other living creatures.
When the only bond between close friends is attachment, then even a minor issue may cause one's projections to change. As soon as our projections change, the attachment disappears, because that attachment was based solely on projection and expectation. It is possible to have compassion without attachment, and similarly, to have anger without hatred.
Unfortunately, love and compassion have been omitted from too many spheres of social interaction for too long. Usually confined to family and home, their practice in public life is considered impractical, even naive. This is tragic.
The indifference, callousness and contempt that so many people exhibit toward animals is evil first because it results in great suffering in animals, and second because it results in an incalculably great impoverishment of the human spirit.
What is the relationship between spirituality and ethical practice? Since love and compassion and similar qualities all, by definition, presume some level of concern for others' well-being, they presume ethical restraint. We cannot be loving and compassionate unless at the same time we curb our own harmful impulses and desires.