I think "undoubtedly one of the most important inventions in math" and "in line with Archimedes, Newton, Einstein" is slightly exaggerated. Logarithms are an important contribution, no doubt. Maybe we could reduce the hyperbole though. --
AxelBoldt
I think he also wrote some religious treatises. Extreme Calvinist stuff i think. Don't how how important that was considered at the time.