 Situationists might nevertheless reply that to emphasize the role of expertise in practical reasoning is to make good moral character an ideal that too few of us, if any, can achieve. On some conceptions of moral knowledge, such as that proposed by Plato in the Republic, acquiring the knowledge necessary for virtue takes over 50 years of psychological and intellectual training. And on Aristotle’s view, as this entry has indicated in Section 2.4 above, the full realization of our rational powers that is required for good moral character is not something that we can achieve on our own. The development and preservation of good moral character requires political institutions that promote the conditions under which self-love and friendship flourish. The situationist might wonder how useful traditional conceptions of good character can be, if acquiring virtuous character is a long and difficult process made possible by social institutions that do not yet exist. The situationist may take these problems as support for his view that we are better off thinking in terms of local traits rather than robust traits.