Earlier I gave a list of 12 moral principles which it would be preferable to teach to kids at birth, and remind them of it in every grade after (and during) kindergarten.
I would now (for adults here) emphasize only two - for the sake of simplicity - and they are: Maximize well-being & Minimize suffering. [I give credit to musical artist Joel Futterman for the following concepts, which clarify what is basic, what takes priority.]
To maximize well-being you would keep in mind, be mindful of, four values: Love, Peace, Health, and Caring for the less fortunate. They all reinforce one another. If you express love toward yourself, and if you care, you will want to achieve health, for this enables you to be strong enough to be able to care for others. If you care for others you will go out of your way to avoid selfishness: you will be considerate and courteous.
Live what you love 
Peace is not merely an armistice, nor a break between wars; it is an inner state of serenity and calm - very achievable by deciding to have it. It is a nonviolent lifestyle which one can freely choose. Value peace, and you’ll never regret it. You will then engage in nonviolent direct action, when it is called for to resist injustice. [Empirical research studies show that a lot less lives are lost than if one engages in violent combat. (We love life, don’t we?)] And why do we want justice? Because there is no peace without justice, no ethical life without justice. Justice (a state of balance) is inherent to Ethics. {The topic of this thread, this discussion, is Ethics.}
If you feel you are in danger of losing your cool, do centering exercises - which you can learn about on the internet - or see a life coach who specializes in this.
Those basic four values have implications, and ramifications. Institutions will have to change; we who care about applying ethics to life (instead of ethics being a mere ivory-tower academic exercise) will have a part in changing them. We know it will be slow going until a tipping point is reached. Then things will happen rapidly.
Caring for the less fortunate is another way of saying: minimize suffering. The first task is to feed the starving. And clothe and shelter them. If we are loving, that of course is what we intend to do. It’s the loving thing to do. We want to reduce, or even end, extreme poverty. This is so basic. It’s a main priority. We can’t be bothered with any other issue, or fake issue. No policy is as relevant
Where will we get the money for it? By taking it from the Defense budget …for we value Peace now, not war. We are nonviolent now, not belligerent. We are not seeking “an enemy” now. If we suffer a blow, such as on 9/11, we turn it over to Interpol since it is a criminal matter. One by one we arrest and isolate from society the criminals responsible …just as we did with John Gotti (1940-2002) or Francesco Madonia (1924-2007.)
For the philosophical arguments that support and defend any positions I have taken, see the documents linked to in the signature below. Study them carefully for edification and enlightenment: