Mesilat Yesharim - Jewish Ethics

Mesilat Yesharim is written by the Ramchal, and unlike his other works, is solely an ethical / mussar work, and not philosophical.
The aim of the book is the perfection of character. Unlike many other musar books, which are ordered the authors' own lists of character traits, Luzzato builds his work on a Beraita (quoted in many places, including (Bablylonian Talmud, Avodah Zarah 20b)) in the name of the sage Pinchas ben-Yair, whose list goes in order of accomplishment: "Rabbi Pinchas ben Yair said: Torah leads to watchfulness; Watchfulness leads to alacrity; Alacrity leads to cleanliness; Cleanliness leads to abstention; Abstention leads to purity; Purity leads to piety; Piety leads to humility; Humility leads to fear of sin; Fear of sin leads to holiness; Holiness leads to prophecy; Prophecy leads to the resurrection of the dead".
Within each step, Luzzatto explains the step itself, its elements, how it can be acquired, and what might distract from its acquisition. For example: Watchfulness can be acquired by setting aside time for introspection, and acquiring watchfulness can be impaired by excessive mundane responsibilities, wrong company or a cynical stance in life. The same pattern is used for every single one of the traits mentioned.
Mesilat Yesharim enables one to be a better person; a better Jew; and to help create a better world.