The Hanover Insurance Group ( THG ) is a company that traces its roots back to 1852. That is something not many companies can say, and speaks to the durability of Hanover's business. For this reason, I believeAnalyst’s Disclosure: I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other than from ...