To begin with, recall that ethics is the branch of philosophy that analyzes and defends concepts of value and thereby seeks to determine right and wrong. It does this not only to provide standards of evaluation, but also to guide actions.
Actions are only one type of event. Other kinds of events aren't the immediate result of human decision or agency.
Note that some of the events do involve humans. But the important point is that where these events do involve humans, they are not the immediate cause of the event. For instance, we do say things such as “Althea blushed.” But when we say that someone blushes, we don’t mean they decided to blush, because we know it is unintentional or involuntary. It makes sense to say that blushing is something that "happens to" someone, rather than being something someone "does".
Contrast this with some instances of actions.
You should also note that even if someone is not passive in the event (such as blushing), they might still not be the immediate cause. For instance eating unhealthily is an action, but the heart disease that may result is not an action because the unhealthy diet didn't make it happen immediately.
When you want to act ethically it is desirable to consider the full impact of your action. Depending on what ethical framework you use, you would need to consider how your actions impact: other people, animals and the environment, society (including customs and institutions), the present and the future, and people’s moral character (both your own and others).
When deciding what to do, it is common to overlook these factors. For instance, it may be easier to ignore these factors if you want to keep a good conscience while acting in your self-interest.
It could also be the case that you fail to consider all relevant considerations because there are too many to possibly calculate. Many of our actions will have effects that we cannot foresee.
We cannot always know all relevant ethical considerations because of how many people our actions effect on a day-to-day basis. But it is important not to purposely ignore these considerations.
Any particular situation will likely have a combination of actions and events, and will have a mixture of ethically relevant and non-relevant considerations.
Suppose you’re deciding how to vote in the next presidential elections. In case your preferred candidate wins, there are many ethical questions to consider when voting. For instance, you should ask, will my preferred candidate: help the disadvantaged, tackle corruption, fight prejudice, encourage fairness?
It would also be ethically relevant to think about how your vote will affect the candidate him- or herself. For instance, you could ask: what kind of person will this candidate become if they win? A political career may make them more sensitive to global problems, but political compromise may also undermine their integrity.
Other non-ethical consideration may also inform your decision. For instance, you might be inclined to vote for the candidate that you find most charismatic or interesting. You might want to vote for the party that your family or friends vote for. The mood you happen to be in on the day of the election might inform your decision. Perhaps you will choose the party with the policies that most directly benefit you.
It should be noted that there is a combination of actions and events in this kind of situation. For instance, deciding you’re not going to vote because you think there is little difference between the candidates is an action. But failing to go to the polling station because you woke you with a bad back is an event.
Some situations have no ethically relevant considerations. This is most usual when the situation is comprised of only events; for instance, the place of the earth in its orbit around the sun. This is dictated purely by events, and there are no ethical considerations in play.
An event whose immediate cause is the decision of an agent