George Gillespie was a Scottish Presbyterian minister (1613-1648). In his early twenties he wrote the book A Dispute Against the English Popish Ceremonies which landed in Scotland just as the 2nd Reformation was getting started and gave it its theological polemic. On the basis of this book he later was chosen, though barely 30, to send as one of the Scottish commissioners to the Westminster Assembly of Divines, hence he is one of those responsible for the Westminster Confession of Faith and Catechisms. He seems to have been a prodigy, single handedly sealing the coffin on the Erastian theory of church polity. He died at only 36 after only 9 years in the ministry and most of that was at the Westminster Assembly.