interaction of individual and collective psychologies, the
latter fairly predictable, the former infinitely varied, the
two together dangerously volatile. The book is not a care-
ful elaboration of a rigid, predetermined vision. More and
more, as Machiavelli rapidly assesses different kinds of
states and forms of government, different contexts, differ-
ent men and their successes and failures, he runs up against
two factors that defy codification: the role of luck and the
mystery of personality. By the end of the book he is beyond
the stage of offering heroes and success stories as models,
aware that if there is one circumstance that a man cannot
easily change it is his own character: even had he wanted
to, Soderini could not have modelled himself on Borgia,
nor vice versa.
In particular Machiavelli is fascinated by the way certain
personality traits can mesh positively or negatively with
certain sets of historical circumstances. A man can be suc-
cessful in one situation then fail miserably in another; a
policy that works well in one moment is a disaster the next.
Rather than one ideal ruler, then, different men are required
for different situations. The only key to permanent political
success would be always to adapt one’s deepest instincts
to new events, but, as Machiavelli ruefully observes, that
would effectively mean the end of ‘luck’ and the end of
history.
Machiavelli’s own mind was deeply divided during the
writing of The Prince and it is the resulting tension that
accounts for much of the book’s fascination and ambiguity.