I'd like to enquire about the ethical beliefs of the atheists here. Could you all give a short summary of your beliefs with maybe some examples and reasons for them?
Also is there any system of ethics you subscribe to or is it just something more personal? Or a little of both?
Three things:
1. The fact that humans
do have innate 'moral intuitions'. See e.g. Steven Pinker, Johnathan Haidt. These arose through evolution and provide us with the underlying values that define us to be 'human'.
2. These intuitions are further informed by our study of game theory, which tell us e.g. why altruism should exist, and why certain scenarios of reward and punishment are or are not effective.
3. Finally, we can take a step back and formulate an ethical philosophy based on ethical principles; this is quite analogous to what happens in physics, for example, in which general principles are recognized and re-applied. These principles can then be used to test the soundness of certain moral ideas, and to identify possible defects in moral reasoning.
So for example: Haidt identifies five major 'moral intuitions' which he labels fairness, nurture, loyalty, respect for authority, and purity. He finds that 'liberal' personalities value mostly the first two: fairness and nurture. 'Conservative' personalities value all five about equally. These findings are robust and appear to apply to every culture everywhere. This tells us a great deal as to why, for example, conservative types should find homosexuality abhorrent - it violates their 'purity' moral sense - and why liberals should think conservatives bigots for doing so - it violates the liberal's sense of 'fairness'.
Concerning game theory, an example is that cooperation quickly breaks down if freeloaders are allowed free reign; but if you allow people to 'punish' free-loaders, cooperation is quickly restored. Since cooperation is to
everybody's benefit (freeloaders included), this provides ethical justification for punishing freeloaders.
As an example of ethical principles, take Rawls' "veil of ignorance". This is ultimately based on the 'fairness' intuition, and it prescribes a means of testing whether a proposed universal law is really fair or not.
So I would not say I subscribe to any particular
system of ethics any more than I subscribe to a particular theory of quantum gravity; as the evidence changes, so the theory might change. Rather I subscribe to a
method that is evidence based and can be applied to moral situations as they arise.
By contrast (and correct me if I'm wrong), theists seem to have a rule-based morality. Rules are handed down by God and people are expected to follow them. That will fit in quite well with the 'conservative' mindset - remember the loyalty and respect for authority? - but not so well with the liberal mindset if those rules violate values like fairness. Also, this system of morality is rather infantile, and I don't mean that in a disparaging sense. Kohlberg studied moral development of children and adults and identified six stages:
1. Obedience in the face of punishment
2. Self-interest
3. Conformity with peers
4. Law and order orientation
5. Social contract orientation
6. Universal ethical principles
Anyone who has had contact with children will probably recognize stages 1-3! Nearly all will reach stage 4 in their teens. But a lot of adults never get past stage 4, which is essentially "Listen to the Law because it is the Law"; in a nutshell, "might is right". This is basically where biblical ethics sits.