moderator:
(plural: ‘moderators‘)
a person whose job is to help fighting people or groups to come to an agreement and make peace;
a president or chairman of a Church court, especially in Presbyterian Church;
an examiner who makes sure that an examination paper marked by somebody else is fair and the marks given are of the right standard;
a person who begins or presides over a meeting, debate or forum,
When some students thought that their answer papers were not marked properly, a moderator was sent to examine those answer papers and make a report.
The moderator requested all the participants of the debate on global warming to limit their remarks to the current topic and not to waste time on other irrelevant statements.
Now there are some political role models who can be sent as moderators to the countries which are engaged in wars with their neighbours in order to make them see the benefits in making peace with their neighbours!


