Ethic is the philosophy of morals and it is needed when two or more morals are mixed up. In our global world we must face a choice between 3 options: to live nihilistic, without morals, like animals or to become entirely Christian or Buddhistic: both are global religions; these two options can live without philosophy at all. And the third, last, would be to find out that set of values which will be the most wise one, either based on the existing morals or by combining with new values. Ethics serve to find that out and I think we can start already now.
It seems that the Declaration on Human rights of the UN has already set up the solution for us and we can do nothing else but fight against poverty in the world. According to the Declaration the individual has no juridical or moral sovereignty and thus all kind of philosophy or morals are a waste of time and will be forbidden if they become more than abstract.
Thus, if you do philosophy without a wish to make it real in some point in time, then you don't need ethics.
Life is will to power. - Nietzsche; The only attribute of the mind is that he is powerful. - Aristotle; Mind is dragging us into the future and the heart into the present. - Aristotle; Those who can foresee deeds are born to rule and those who need to do them are born as slaves. - Aristotle; So, what is an aristocrat? He needs to be powerful, that means to be excellent in foreseeing things! - Me; The highest honor belongs to that one who is able to predict the moves of the enemy commander. - Machiavelli; If you want that what you have inherited to possess, you need to deserve it. - Goethe