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a thing that is most true, it has yet to be shown why this must be the same |
thing. Aquinas perhaps had in mind a principle requiring the cause of a |
thing β s being also to be the cause of its other positive attributes or the cause |
of its perfections. If so, such a premise would need to be inserted into the |
argument before C4. |
In the world some things are found to be more and less good, more and |
less true, more and less noble, etc. But more and less are predicated of diverse |
things insofar as they approach in diverse ways that which is maximal in a |
given respect. For instance, the hotter something is, the closer it approaches |
that which is maximally hot. Therefore, there is something that is maximally |
true, maximally good, and maximally noble, and, as a result, is a maximal |
being; for according to the Philosopher in Metaphysics 2, things that are |
maximally true are maximally beings. |
But, as is claimed in the same book, that which is maximal in a given genus |
is a cause of all the things that belong to that genus; for instance, fi re, which |
is maximally hot, is a cause of all hot things. Therefore, there is something |
that is a cause for all beings of their esse , their goodness, and each of their |
perfections β and this we call God. (ST I, q2, a3, response) |
P1. There are some things that are more or less good, more or less true, or |
more or less noble. |
P2. If something is more or less F, then there is something maximally F. |
C1. There is something maximally good, something maximally true, and |
something maximally noble (substitution, and modus ponens , P1, P2). |
C2. There is something maximally true (simplifi cation, C1). |
P3. If something is maximally true, then it is maximally being. |
C3. Something is maximally being ( modus ponens , C2, P3). |
P4. If something is maximally F, then it is the cause of all things that are F. |
C4. There is something that is the cause for all beings, their goodness, |
and each of their perfections ( modus ponens , C1, P4). |
C5. We call that thing which is the cause of the being, goodness, and |
perfection of all other things β God β (defi nition). |
The Fifth Way β The Argument from the Governance |
Aquinas argues in the Fifth Way that if things always or for the most part |
act for a particular end, that is evidence of their being directed at that end |
by an intelligent agent. In nature, most natural things act always or for the |
most part for a particular end, and so nature is directed by an intelligent |
agent. Note that, for Aquinas, to act for the sake of an end does not require |
intentionality. In Aquinas β way of speaking, fi re acts for the sake of the end |
Aquinasβ Five Ways 17 |
when it burns upwards and the stone acts for the sake of the end when |
falling down to the earth. One might think that evolutionary biology allows |
a way out of the design or chance dilemma, since, given evolutionary |
biology, something could always or for the most part act for the sake of an |
end but not due to either design or chance but rather natural selection. |
Aquinas β argument, however, is not aimed solely at biological entities. An |
electron, for instance, attracts positively charged particles always or for the |
most part, but it did not acquire this property via some evolutionary |
process. So even if natural selection narrows the scope of Aquinas β argument, |
it alone does not defeat the argument. |
We see that some things lacking cognition, viz., natural bodies, act for the |
sake of an end. This is apparent from the fact that they always or very frequently |
act in the same way in order to bring about that which is best, and |
from this it is clear that it is not by chance, but by design, that they attain |
the end. |
But things lacking cognition tend toward an end only if they are directed |
by something that has cognition and intelligence, in the way that an arrow is |
directed by an archer. Therefore, there is something intelligent by which all |
natural things are ordered to an end β and this we call God. (ST I, q2, a3, |
response) |
P1. If something always or for the most part acts in the same way in order |
to bring about that which is best, then it acts for the sake of an end. |
P2. Beings in nature always or for the most part act in the same way in |
order to bring about that which is best. |
C1. Beings in nature act for the sake of an end ( modus ponens , P1, P2). |
P3. If beings in nature act for the sake of an end, then beings in nature are |
directed by something that has cognition and intelligence. |
C2. Beings in nature are directed by something that has cognition and |
intelligence ( modus ponens , C1, P3). |
C3. We call that director of unthinking things β God β (defi nition). |
2 |
The Contingency |
Cosmological Argument |
Mark T. Nelson |
The Contingency Argument is a version of the cosmological argument for |
the existence of God, proposed by Samuel Clarke (1675 β 1729) and rescued |
from obscurity by William Rowe (b. 1931). The cosmological argument is |
not, in fact, a single argument but a family of arguments that attempt to |
prove, or at least render plausible, the existence of God based on the existence |
of the cosmos. Typically, these arguments have two stages: the fi rst |
arguing from the existence of the cosmos to the existence of a necessary |
being or fi rst cause of this cosmos; the second arguing that this necessary |
being or fi rst cause is God. Regarding the fi rst stage of the argument, scholars |
sometimes distinguish between two versions: those based on the idea |
that infi nite causal regresses do not exist and those not based on this idea. |
The fi rst three of Thomas Aquinas β (1224/5 β 74) β Five Ways β (#1) are |
examples of the former; Clarke β s contingency argument is an example of |
the latter. Aquinas argues, for example, that an uncaused fi rst cause of |
Clarke , Samuel . A Demonstration of the Being and Attributes of God and |
Other Writings , edited by Enzio Vailati . Cambridge, UK : Cambridge |
University Press , 1998 . |
Rowe , William L. The Cosmological Argument . Princeton, NJ : Princeton |
University Press , 1975 . |
___. Philosophy of Religion: An Introduction . Belmont, CA : Wadsworth , |
1978 . |
Just the Arguments: 100 of the Most Important Arguments in Western Philosophy, |
First Edition. Edited by Michael Bruce and Steven Barbone. |
Β© 2011 Blackwell Publishing Ltd. Published 2011 by Blackwell Publishing Ltd. |
The Contingency Cosmological Argument 19 |
β sensible beings with effi cient causes β must exist, because, if it did not, |
there would be an infi nite regress of caused causes, but such infi nite causal |