The word, 'moralis' was the Latin translation by Cicero of the word 'ethikos' used by Aristotle. Modern science severed ethics from the knowledge process under the assumption, rightly, that one could not derive a statement about what is good to do by from a statement about what is true. Aesthetics deals with that which is beautiful and universally appealing to the senses. This means that one cannot build a theory of elegant architecture, painting, poetry or music on symmetry, regularity, precision, uniformity or other neat and tidy terms so much beloved of modernists. Those who have seen 'The Dead Poets Society' will remember that the first thing Robin Williams did in his poetry class was to have the students tear out the first page which said that one could judge great poetry by charting it in terms of both the significance of the topic and the universality of its message.
Logic is the fifth part of modern philosophy.
It offers a treatment of valid reasoning. Aristotle thought that logic was a basic knowledge tool. The first starts with absolutely true premises and yeilds absolutely true inferences. As it turns out, both forms of logic exclude statements which may be both empirically observable and, at the same time, contradictory. The new sciences of chaos and complexity demote the use of logic and linear math as epistemological tools.