The phrase "an ethical system" is correct and usable in written English.
You can use it when discussing frameworks or principles that guide moral behavior and decision-making.
Example: "Philosophers have long debated the merits of utilitarianism as an ethical system."
Alternatives: "a moral framework" or "a code of ethics."
But every religion has an ethical system.
"Is what we can create an ethical system, or a system that doesn't contravene humans?
Isaac Asimov, for example, devoted much effort to creating an ethical system for humans and robots.
Mindfulness in Buddhism is practised in the context of an ethical system that places no value on seeking sensory thrills.
This "religion of loyalty" was supplemented by an ethical system that showed his emphasis on the human will.
Hayek, like other free-market theorists, developed an ethical system in which only a particular personality or character fits within the market order.
Avoision is an undesirable feature of any ethical system that allows such strategic manipulation of its doctrines.
In its adjudicative aspect any ethical system is a feedback loop: feedback is deemed negative when one's utterances or actions are not considered to be socially normative, or deemed positive when they are.
And, even though 'spiritual messages' may be received by the practitioners of traditional African religion through those mystical encounters part of which ('messages') may relate to moral conduct, nevertheless such messages appear to be too few and far between to constitute an adequate basis for a coherent ethical system.
Still controversial, it is periodically subject to attacks from a state that fears that it may become the basis of an alternative ethical system that will challenge Communist Party rule.
The conference came on the heels of a change in leadership at the council and a rumored rift there, which some described as a standoff between atheists, who focus on God's nonexistence, and humanists, who are also nonbelievers but seek an alternative ethical system, one that does not depend on any deity.
