
I think most will agree that terms are often best explicated in relation to other terms- either ones with similar meanings or otherwise ones with opposing meanings. For this reason then an expedient comparative analysis of deontology and teleology.
Mostly these two terms are spoken of in relation to each other in discourses seated in moral philosophy. But the use of these terms can and are extended to other discourses. We start with the moral. Kant’s theories are said to be forwarding a deontological notion of moral action or deliberation. This means that, for Kant, all moral decision making should be done according to a sense of duty. Moral duty in particular. According to deontological theories it is wrong to base any moral deliberation, and the eventual moral action based on this deliberation, on what will be the consequences of that action. To do this would be to take into account the contingent nature of the context in which the moral action takes place. And the contingent context is variable, unreliable and based in the part of reality which has everything to do with the sensory world and, therefore, nothing to do with the overarching, rationally pure and perfectly stable world of law. Principles, principles and more principles. Principles simply are not dependent on the ‘the nature of things’ to make them either right or wrong. If this were the case they would, by definition, not be a principle.
On account of the above, deontological theory suggests that in our moral decision making we do what is right and wrong based in moral duty. And such duty is a priori associated with the action in question. There are no mitigating circumstances which could way in on a situation and which could serve as possible reasons for making a decision contrary to the a priori correctness of a moral law or imperative. So, according to Kant’s deontology, our focus as moral agents should be on moral duty, on the principles which provide the imperatives for certain actions to be either considered right or wrong, and not what would be the consequences of either choosing to act or not. Graphically put: we look into the moral nature of the action itself and our duty which we have around such as action, and not outwards towards the future consequences of this action.
Teleological theory suggests that we base or moral decision making on what the consequences of an action would be. In other words, the suggestion is that our motivations for actions are seated in the contingent world which surrounds things such as moral actions. Depending on what sort of teleological theorist one is it will either be claimed that the consequences of actions do, despite our best intentions and maybe even resistance, form the reasons for our actions. In other words, whether we agree with the deontologists or not, in principle (excuse the pun), it simply is the case that the future outcomes of moral actions are the reasons which propel us towards making such decisions. And not things like over arching moral laws which we abide by as rational and moral agents.
But whether it is the consequences of actions or the moral duty rationally embedded in moral actions which motivate, or ought to motivate, us to act is not for this posting.
What is, however, for this posting is whether or not teleology must, by definition, imply something theological. In other words, when we say that certain things ‘happen for a reason’ do we necessarily, or logically, refer to something like a divine plan? Firstly, from the above it should be significantly clear that both deontological and teleological views propose that ‘things happen for a reason’. But these reasons, as we have seen, are not the same. So, if it is being claimed that teleological thinking is always based in some sort of religious thinking it could be claimed this for deontology as well. If god, or a prime mover, is the inspiration giving rise to all action (not just moral action) and design in nature it is just as feasible to say that god or a prime mover has laced all action and design, moral and natural, with the imperatives for their existence- regardless of what the outcomes of their existence and design would have on their contingent environment or how they are influences by these environments.
But, secondly, the point really is, that neither teleology nor deontology need subscribe to theology for semantic sense. A Darwinian theory about design, for instance, is a perfectly good description of why certain things happen in nature. The reasons for design and dynamics in nature are ascribed to the consequences thereof in the larger context of nature or to the future survival of a species of some kind. So change, action or even design is based in reasons which have to do with sustaining or bringing about more change, action or design. With no reference being made to ultimate or absolute goals and or ends needing to be achieved. The actions and the reasons for these actions all reside within a closed system. If the argument seems circular to the astute reader, then I caution that it may the content forwarding a secular explanation of ‘things happen for a reason’ which is confusing you thus. Read again.
But why, some ask mysteriously, is the human mind so designed as to be constantly thinking of the big ‘why’ questions. Yes, we may be able to see that this empirically based reason explains why that happens. But such reasons cannot give an account of what it is all about. Why all of this? What is it all for? What is it all aiming to achieve? It is because of this predisposition of ours that we come up against answers of a non-secular nature. And then, of course, the next reasonable question must be, but why are we made thus. There must surely be a reason why our minds are fashioned in a way to be constantly bringing us to these overarching questions leading to their overarching answers. This question itself seems to be enough evidence for some that everything has a greater goal. One seated outside of the material systems.
Here is a suggestion: We are fashioned thus because meaning making is part of our need to and ability to use language. And the use of language has directly to do with our imperative to survive and maybe even for our pursuits in the abstract arts. (But this is for another discussion, dear reader.) The fact that this faculty for meaning making gets us, in an obsessive sort of way, to answer perfectly natural questions with religious answers is a by product of evolutionary imperatives. But maybe, hopefully, we shall be losing this cumbersome tendency like the birds on the Galapagos Islands are losing their wings. Because the use for these have become redundant. It just takes some time. In the meantime, it is perfectly within reason to take teleology as a term which does not, necessarily, have a religious basis.