Good and Evil without God or Religion
By Alan D Griffin
First there is no objective concept of "good" or "evil" these concepts are purely subjective. Take the practice of infant sacrifice in Mayan and other cultures. This idea to the modern western mind is pure evil but to them their gods demanded it. So, to them to not sacrifice infants would be evil because it would mean the death and destruction of their entire culture. So therefore sacrificing infants was "good". The concept of "Good" can generally be described as that which is beneficial to the group or species at no cost or at a cost to the individual. The concept of "Evil"can generally be described as that which is beneficial to the individual self at no cost or at a cost to the group or species. There are 2 ways I see how we can have secular morality without the need to evoke a God. The harm principle and Biological Altruism.

The bare minimum for "Good" is simply to not cause Harm to others.
Harm is defined as causing hurt, injury, or damage to someone or something. The harm principle which is stated in John Stuart Mill's book "On Liberty"as follows "That the only purpose for which power can be rightfully exercised over any member of a civilized community against his will, is to prevent harm to others." Which means governments or individuals should not interfere with others freedom except in cases of Direct, Serious, and Probable Harm. Direct, should only Mean an immediate action and not as a result of multiple events. Serious,should only mean, an action that has a benefit or consequence that will greatly change the course of someone’s life. Probable, should only mean, that a certain action will have a highly likely an obvious outcome to the average person. Harm should not include being annoyed, inconvenienced, or offended. Harm should only mean that the
actions of another directly caused serious consequences to a life that was obvious and likely by the observation of an average person. So any attempt to cause harm is "Evil" and the level of "Evilness" is a direct result of the amount of harm done. The level of "Goodness" starts with the bare minimum of not causing harm and the level of "goodness" is dependent on Altruism. Altruism has long been seen as a direct result of religion. Altruism is feelings and behavior that show a desire to help other people and a lack of selfishness. But we find altruism across the animal world. This is a product of evolution and is in line with ideas of natural selection for survival of the species. In evolutionary biology, an organism is said to behave altruistically when its behavior benefits other organisms, at a cost to itself. The costs and benefits are measured in terms of reproductive fitness, or expected number of offspring. So by behaving altruistically, an organism reduces the number of offspring it is likely to produce itself, but boosts the number that other organisms are likely to produce.
So we can have secular morals without the need for religion or God. By teaching people the harm principle which we go by naturally because reducing harm in others reduces the chance of harm coming upon ourselves. And invoking our natural evolutionary altruism we can go above the bare minimum for "Good" which is to not cause harm.
Cultures simply call that which puts the self above the group "Evil" and that which puts the group above the self " Good". This is an easy enough concept to grasp without the need to evoke God or religion.