The Gresham College group was a loose collection of scientists in England of the 1640s and 1650s, a precursor to the Royal Society of London. Within a few years of the granting of a charter to the Royal Society in 1662, its earlier history was being written and its roots contested. There is still some debate about the effect of other groups on the way the Royal Society came into being. The composition of those other groups is unclear in parts; and the overall historiography of the early Royal Society is still often regarded as problematic. But this group has always been seen as fundamental to the course of events.