Religious apologists often overlook secular reasons to be decent to our fellow man in order to make their arguments that morality can only be grounded in God. For them, I present these ten secular incentives to ground one's morality in reason.
Points one and two can be seen
as a catch all and that all following points can be seen as subsets of
one and two. The truth is, by making one and two so broad was the only
way to cover all the ways people can come to what we consider good
behavior. The rest are just some specifics that are probably obvious to
all but the most religious of apologists.
1. To avoid negative consequences.
Try to kill, rape, or steal from someone and that someone will be pissed. If the person is able to hurt you, he or she is much more likely to hurt you as a punishment of your previous action. The motivation for the retaliation could be revenge or just to put you on notice that if you try that shit again then you’ll be hurt again. If that person is unable to hurt you directly, he or she may have allies who will. Even if the person has no allies, anyone else who witnesses your transgression may make an example out of you in order to discourage such transgressions in there future against them. This is part of the foundational reasoning for enforced laws in societies.
2. To claim positive rewards.
There are a variety of incentives to act positively toward others. Some speak to other items on this list. Safety, camaraderie, freedom, and charity are just some things we can enjoy in a mutually altruistic culture. Hell, even after you do wrong, good behavior may lessen your sentence.
3. To conform.
Conformity is sometimes colored as a negative, but not here. If most people are violent, you need to conform to violence to defend yourself. However, if most people are generally peaceful except toward violent defectors, you’d do well fit in with the generally peaceful majority.
4. To collaborate.
The division of labor allows for some people to specialize in certain tasks and other people to specialize in others. The result is that each task is performed using less resources and time. Trade comes from collaboration, which is why we can barter or buy food rather than needing to grow or hunt it ourselves-an activity that would otherwise take up most of our time with less net nourishment. All this is possible only if you don’t scare or alienate your community by doing what we consider immoral-especially in excess.
5. To not be alone.
There is a reason long-term solitary confinement is among the worst treatments of prisoners. Everyone I know values some amount of socialization. It should be obvious that one needs to ingratiate themselves to others to avoid this treatment occurring. At the very least, your actions need to not offend others, as immoral actions often will.
6. To be left alone.
Even if you want solace, you will not find any by being immoral. Act against others and they will naturally act against you. To be alone you need to be neither moral or immoral. You need to be isolated.
7. To realize a winning game theory strategy.
Cooperation may seem like a bad idea when you can cheat to achieve a short-term win, but even if you ignore the other listed reasons, you’d still know that’s a bad idea with a little experience or foresight. Game theory shows that groups that don’t screw each other profit more than groups that defect from cooperation. Caring only for yourself as an individual means gaining less in the long run.
8. To protect oneself.
One, even the strongest one, will never be able to defend himself or herself from a group. I don’t care if you’re Batman, a large enough group will prevail. Being a dick to everyone ensures you will have no allies because everyone will either actively want you to fail or passively stand by while you do. Sure, you can be a dick to some and not others. That happens. In fact, that explains most of the world. Absolute dickishness, however, is a horrible life strategy.
9. To explore emotions.
If you resist acting immorally toward people long enough, you might start to like some of them. Love and other emotions are some of the most valued aspects of life, whether you want to say they are from chemicals in the brain or deities in the sky. Either way, a deity in the sky isn’t needed to explain why we might refrain from acting a fool in order to explore these emotions.
10. To live out one’s indoctrination.
How many of the beliefs that inform our behavior are taken for granted because their source was our first authority figures: our family. You probably know someone who acts in a way different from you because of their different upbringing. To that person, the same applies to you. The things my family told me to do and not do are informed by the other items on this list, but even if they weren’t, I would have still listened, at least when I was young.