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There is no substantive evidence for an omnipotent father-figure deity as postulated by the Christian/Jewish/Islamic tradition. So without religion can there be morality? Certainly, because true moral behavior is based upon simple self-interest. The guiding ethic is to truly act in your own best interest. That would mean treating all people fairly, honestly and, as it says in the Hippocratic Oath, “Cause no harm.” Religions invent all other “sins” to increase their control over people.
People such as atheists practice what I term enlightened self-interest. An individual’s self-interest is best served by doing no harm to others except in defense of themselves or those in their care. This thinking does not need threats of eternal punishment to follow, It only requires thinking about what will ultimately yield the best results for yourself. Treating others fairly and generously is always better for yourself, personally, financially, and socially.
For example, robbing a bank may yield temporary wealth, but at the expense of either a prison term or a life of fear, running from the law. Similarly, cheating others in business dealings may increase profits for a time. Eventually, your reputation will be so poor that your business may fail. This is a simple principle that “It’s always cheaper to make a customer happy than it is to make him angry.” That same idea can pay dividends in ordinary human relations. For reasons I don’t understand, few businesses or people appreciate this idea. Maybe it’s because they operate on deist principles? Everything is forgiven if you repent before you die. Although that wouldn’t seem to help those you cheated, treated badly or even murdered.
So should nothing be discouraged? Should everything be permitted? Capable, informed individuals could engage in any activity that interests them even if it puts them personally at risk.
An example would be an automobile race. It is certainly dangerous to drive at racing speeds and it is equally dangerous to stand near the race course to observe or record this event. Two people may choose to do these things if they understand and accept the risks involved.
One question that arises from this would be, what if one or both of these people have a spouse and children that depend upon them for financial and emotional support? Should they still do this knowing that if they are injured or killed it will cause some degree of harm to these dependents? If they choose to do so, does anyone else have the right to prevent them?
Those are ethical questions that can and should be debated, but each person must be free to choose his own answer. No other person, religion, or government should have the right to make these choices for us. You can do what you want if you are prepared for all possible consequences, no matter how remote the possibility.