German idealism
Neo-Kantianism refers broadly to a revived type of philosophy along the lines of that laid down by Immanuel Kant in the 18th century, or more specifically by Schopenhauer's criticism of the Kantian philosophy in his work "The World as Will and Representation" (1818), as well as by other post-Kantian philosophers such as Jakob Friedrich Fries and Johann Friedrich Herbart. It has some more specific reference in later German philosophy.
Feminist Jewish ethics
Hermann Cohen was a philosopher who lived from 1842-1918 who held many of the same philosophical beliefs as Immanuel Kant, but applied to Judaism. Cohen also sees ethics as what "ought to be" in the social world, as opposed to seeing what "is" as a current state of affairs that is unchangeable. According to Cohen, only God falls into both categories of what "is" and what "ought to be". According to Cohen, ethics are equivalent to what ought to be. Jewish feminist ethicists have use Cohen's Kantian ideas by expressing their ideals for equality for women in Judaism as what ought to be.