His work on law , diplomacy , and history was seen as of ephemeral interest .
In any event , philosophical fashion was moving away from the rationalism and system building of the 17th century , of which Leibniz had been such an ardent proponent .
Leibniz 's work on law , diplomacy , and history was seen as of ephemeral interest .
In any event , philosophical fashion was moving away from the rationalism and system building of the 17th century , of which Leibniz had been such an ardent proponent .