and actions will be determined by his own mental
activity. In general terms, therefore, Spinoza conceived
of freedom as self-determinism, not indeterminism.
The views of Gottfried Wilhelm Leibniz on freedom
are also intimately bound up with his metaphysical
outlook. Like Spinoza, he rejected any conception of
freedom based on the assumption that a choice is
undetermined (philosophers often call this conception
of freedom the âliberty of indifferenceâ). Any choice
is determined by a combination of nonrational factors,
i.e., feelings, together with a rational appraisal whose
purpose is the selection of the act that appears to be
for the best. An act is free if the predominant compo-
nent in its determination is the man's reason or intelli-
gence. But, according to Leibniz' metaphysical system,
each individual person's life is the necessary unravel-
ling of his given nature. Thus, all acts are necessary,
including, therefore, free acts. Leibniz may be classified
as a âreconciliationistâ because he tried to reconcile
this metaphysical theory of necessity with his belief
in freedom. His task was more difficult than the analo-
gous task for reconciliationists like David Hume and
Moritz Schlick because the latter two denied the exist-
ence of objective necessity. In this regard, Leibniz
distinguished necessity from compulsion, the latter, of
course, being incompatible with freedom, and made
distinctions among different types of necessity (meta-
physical, moral, and physical).
John Locke defined freedom as the power a person
has to act in accordance with his will. Sense experience
does not provide man with a clear idea of any power.
So reflection, or the mind's experience of its own
activities, is the source of all knowledge of power,
including, of course, the knowledge of freedom. Free-
dom is the opposite of necessity; but Locke defines a
voluntary act as one that is preferred by the agent even
if the act is not free, i.e., even if the act is performed
necessarily. Will, like freedom, is defined as a power
of a person, to wit, the power to will or to perform
that act of preference or thought that sometimes gives
rise to the preferred act. Since freedom and will are
powers of persons, freedom cannot meaningfully be
predicated of the will; hence, there is no genuine
concept of free will.
Locke is forced to concede, however, that the con-
cern about free will is genuine because it is the concern
about the freedom to will rather than the freedom of
will. Locke initially denies this freedom on the ground
that a man must choose some alternative in a decision-
making situation. Realizing that the question does not
concern the freedom to make some choice, but rather
the freedom to make a specific choice, Locke examines
the status of the question, âIs he free to will A?â He
concludes that the question is absurd because the an-
swer is a tautology. A man cannot but have it in his
power to will what he in fact wills. Locke fails to see
that the concern here is not with whether or not a
man can will what he does will (since he does will
A, he can will A), but whether or not he can will what
he does not will. For if willing A is the only act of
will in his power, it looks as if the act is not free in
some important sense of âfree.â
Locke added a section on the determination of the
will to the second edition of his Essay Concerning
Human Understanding (1694). His psychology is
hedonisticâman's will is always determined by a state
of uneasiness and, given that he believes this state can
be removed, he will act accordingly, priorities being
determined by the relative urgencies of the uneasy
states. Into this mechanistic picture, Locke introduced
âfree-willâ as the power to prevent desire or uneasiness
from determining the will. But this turns out not to
be a concession to indeterminism, but rather to those
who identify freedom with rational action, e.g.,
Leibniz. For the interruption of the mechanical work-
ings of the will is due to a judgment formed as the
result of deliberation and consideration of alternative
courses of action. Thus, a man may foresee that an
act he would perform has an undesirable consequence
and this judgment, rather than the uneasiness that
would lead to the act, determines the will to refrain
from that act. In reply to the charge that a âfree-willâ
is incompatible with a determined will, even if reason
determines the will, Locke presents his case against
the advocates of the liberty of indifference, arguing
that freedom cannot be conceived as the irrelevance
of our judgments to our will. A conception of freedom
similar to Locke's âfree-willâ was also advanced by
René Descartes.
Although the view that determinism is true and
compatible with the existence of free will has been
held by a number of philosophers, contemporary
thinkers associate Hume's name, more than any other,
with this doctrine.
The belief that all physical events have causes such
that a given physical event must occur if the event
that always caused it in the past recurs is a belief that
has equal validity in the psychological sphere. We can
predict how any human being will behave if we have
a complete knowledge of his motives, circumstances,
background, etc. Since determinism is true even in
psychology, there is no liberty of indifference. But
Hume agreed with Locke that the existence of such
liberty would not be worthwhile anyway. A man who
had this sort of liberty would not be a genuinely re-
sponsible agent. It would be pointless, for example, to