Exhibit 2.1 EXECUTION COPY AGREEMENT AND PLAN OF MERGER THIS AGREEMENT AND PLAN OF MERGER (the "Agreement"), dated as of December 8, 2005, by and between PROASSURANCE CORPORATION, a Delaware corporation ("PRA") and PHYSICIANS INSURANCE COMPANY OF...Agreement and Plan of Merger • December 9th, 2005 • Proassurance Corp • Fire, marine & casualty insurance • Delaware
