He also wrote about possible meanings to a Jewish and democratic state, the meaning of a Jewish collective and many other essays. His essays on Jewish subjects are collected in a book titled Ruach Ish (Spirit of a Man), published in Hebrew by Am Oved publication house. He is also the editor of the philosophy journal Philosophia. Kasher has contributed as well to the fields of psychology and ethics.
Uri Avnery criticised Kasher for arguing in favour of targeted killing by the IDF, in those cases in which it knowingly fires on targets where civilians are present or nearby if enemy forces are also known to be present, and that "it is justified to kill a Palestinian child who is in the company of a hundred 'terrorists'" because the terrorists might kill children.