Tact and subtle skill in dealing with people so as to avoid or settle hostility.
The art and practice of conducting international relations by negotiating alliances, treaties, agreements etc., bilaterally or multilaterally, between states and sometimes international organizations, or even between polities with varying status, such as those of monarchs and their princely vassals.
Differential treatment of an individual or group to their disadvantage; treatment or consideration based on class or category rather than individual merit; partiality; prejudice; bigotry.
Discernment, the act of discriminating, discerning, distinguishing, noting or perceiving differences between things, with the intent to understand rightly and make correct decisions.
The quality of being discriminating; acute discernment, especially in matters of good taste.