ally of the state,
notwithstanding the change that has happened in it. _However, when this
change renders the alliance useless, dangerous, or disagreeable, it may
renounce it; for it may say, upon a good foundation, that it would not
have entered into an alliance with that nation, had it been under the
present form of government._

[Sidenote: Not an eternal war.]

"We may say here, what we have said on a personal alliance: however
just the cause of that king may be who is driven from the throne either
by his subjects or by a foreign usurper, his aides are not obliged to
support _an eternal war_ in his favor. After having made ineffectual
efforts to restore him, they must at length give peace to their people,
and come to an accommodation with the usurper, and for that purpose
treat with him as with a lawful sovereign. Louis the Fourteenth,
exhausted by a bloody and unsuccessful war, offered at Gertruydenberg to
abandon his grandson, whom he had placed on the throne of Spain; and
when affairs had changed their appearance, Charles of Austria, the rival
of Philip, saw himself, in his turn, abandoned by his allies. They grew
weary of exhausting their states in order to give him the possession of
a crown which they believed to be his due, but which, to all appearance,
they should never be able to procure for him."--Book II. ch. xii. Sec.Sec.
196, 197.

DANGEROUS POWER.

[Sidenote: All nations may join.]

"It is still easier to prove, that, should this formidable power betray
any unjust and ambitious dispositions by doing the least injustice to
another, every nation may avail themselves of the occasion, and join
their forces to those of the party injured, in order to reduce that
ambitious power, and disable it from so easily oppressing its neighbors,
or keeping them in continual awe and fear. For an injury gives a nation
a right to provide for its future safety by taking away from the
violator the means of oppression. It is lawful, and even praiseworthy,
to assist those who are oppressed, or unjustly attacked."--Book III. ch.
iii. Sec. 45.

SYSTEM OF EUROPE.

[Sidenote: Europe a republic to preserve order and liberty.]

"Europe forms a political system, a body where the whole is connected by
the relations and different interests of nations inhabiting this part of
the world. It is not, as anciently, a confused heap of detached pieces,
each of which thought itself very little concerned in the fate of
others, and s