Gottfried Leibniz wrote a supremely brilliant but notoriously obscure treatise titled the Monadology. The present work - written by Dr. J-M Kuczynski, the leading rationalist philosopher of the last 300 years - is an analytic summary of that work.
The empirical sciences make assumptions that they are not themselves capable of justifying. Philosophy justifies those assumptions; that is its job.
The moral basis of legal obligation is identified.
This work is an assessment of Hedonism (one's sole moral obligation is to enjoy oneself), Egoism (one's sole obligation is to maximize one's own welfare), Consequentialism (the ends justify the means), and Deontology (the ends do not justify the means).
Dialogues about the human condition.