The College Historical Society (CHS) – popularly referred to as The Hist – is a debating society at Trinity College Dublin. It was established within the college in 1770 and was inspired by the club formed by the philosopher Edmund Burke during his own time in Trinity in 1747. It holds the Guinness World Record as the "world's oldest student society".

Debate is a process that involves formal discourse, discussion, and oral addresses on a particular topic or collection of topics, often with a moderator and an audience. In a debate, arguments are put forward for common opposing viewpoints. Debates have historically occurred in public meetings, academic institutions, debate halls, coffeehouses, competitions, and legislative assemblies. Debates have also been conducted for educational and recreational purposes, usually associated with educational establishments and debating societies. These debates emphasized logical consistency, factual accuracy, and emotional appeal to an audience. Modern forms of competitive debate also include rules for participants to discuss and decide upon the framework of the debates.