Meditation is valuable for all of humanity because it involves looking inward. People don't have to be religious to look inside themselves more carefully. It is constructive and worthwhile to analyze our emotions, including compassion and our sense of caring, so that we can become more calm and happy.
As people alive today, we must consider future generations: a clean environment is a human right like any other. It is therefore part of our responsibility toward others to ensure that the world we pass on is as healthy, if not healthier, than we found it.
When we are angry we are blind to reality. Anger may bring us a temporary burst of energy, but that energy is blind and it blocks the part of our brain that distinguishes right from wrong. To deal with our problems, we need to be practical and realistic. If we are to be realistic, we need to use our human intelligence properly, which means we need a calm mind.