Mumford, Stephen and Rani Lill Anjum. Getting Causes from Powers.
Briceno, Jose Sebastian
MUMFORD, Stephen and Rani Lill Anjum. Getting Causes from Powers.
Oxford: Oxford University Press, 2011. xvi + 254 pp. Cloth, $65.00--This
book offers a fresh primitivist theory of causation, a positive
alternative to the reductive attempts that try to explain causation in
terms of something noncausal. The explanation offered by Mumford and
Anjum is in terms of properties. Events, facts, and objects participate
in causation only in a parasitic way. But what kind of properties are
relevant to causation? Their answer is causal powers. "Properties
just are clusters of causal powers." Effects are brought into
existence when powers are manifested, though powers still exist when not
manifested. Importantly, powers are only disposed towards some
manifestations; they do not necessitate them. These manifestations are
causes for further effects. Causation is just "passing powers
around." It is a confessedly circular theory: causation is
explained in terms of powers; powers in terms of dispositions (causes)
towards some types of manifestations (effects). Causation, we are told,
is already a basic ingredient of the world and a "simple
idea," not something to be reduced or analyzed in terms of other
more basic ingredients or more simple ideas. The constant failure of
reductive attempts is explained by their falsity: they do not provide
sufficient truthmakers for basic (causal) truths. The authors make a
convincing case against the reducibility of causation, appealing to a
wide range of scientific, epistemic, and metaphysical arguments.
Circularity, after all, is better than falsity and anyway unavoidable
when explaining primitives. The major novelty of this book, however,
lies in the detailed way in which the fruitfulness of causal primitivism is tested against the usual challenges: the problem of distinguishing
causes from effects and background conditions; the relations between
causation, laws, counterfactuals, and explanation; the problems of
omission and prevention; the problems of transitivity and simultaneity;
the peculiar modal force of causation; the perception of causation. The
essential move that the authors make to face these classical problems is
their rejection of the dominant view according to which causation is a
"relation" between separate and distinct relata. This idea has
framed the development of the Humean reductive tradition but also has
conditioned anti-Humean criticisms, in a way that the anti-Humean is
regarded as trying to provide a "metaphysical glue" to bring
things together in a relation stronger than that of constant
spatiotemporal contiguity. In contrast, the authors say that we should
think of causation as a continuous process of change, with no temporal
gaps. "Causation should not then be understood as a relation
between two events, but rather as what makes an event occur." The
anxiety for "metaphysical glue" only appears when we see cause
and effect as loose and separate. But if there is no temporal gap
between cause and effect, these are not wholly distinct existents: they
are both indivisible parts of a continuous process. A process in the
sense used by Mumford and Anjum is not an aggregate of discrete
point-like events or snapshots. We can choose a part of that process and
call it "cause" or "event,." Then we can choose a
later part of that same process and call it "effect" or
"[event.sub.2]." Yet there is no separation. A cause is
"depicted as merging into and becoming the effect through a natural
process."
The idea of an undivided process is central to the solutions
offered by Mumford and Anjum. But it is also the source of a fundamental
tension in their work. While they simply dissolved the problem of
interaction of distinct relata (a unified and undivided process makes
the need of a "metaphysical glue" superfluous), underlying
their work is also a clear commitment to a substance-attribute ontology.
"Properties do not, however, float freely in the world. They are
properties of things." "It is a something about the substance
that does its causal work." The continuity and unbroken character
of process is what brings the unity that other accounts of causation
cannot provide. Now, how can that unity be possible if causation is
something that involves powers instantiated by distinct substances? This
problem is not the result of Humean scepticism against powers. It is a
puzzle raised by two metaphysical claims that seem incompatible or at
least in clear tension: the self-contained, persistent, and independent
character of powerful substances versus the continuous, always changing,
and undivided character of a process of causal influence. Leibniz solved
the problem by accepting immanent process and activity, but rejecting
inter-monadic causal influence. Process philosophers solved it by
rejecting substances. Monists solved it by denying plurality. Mumford
and Anjum have made a valuable contribution to expand the horizons of
our understanding of causation, but they still owe us their answer to
the former dilemma, and this answer demands an ontological
sacrifice.--Jose Sebastian Briceno, The University of Nottingham.