Dr. Nir Shaviv spoke at a Friends of Science event on June 2, 2015, on Solar Forcing. Dr. Shaviv explained and demonstrated that the sun is an important climate driver but it is missing from the standard climate analyses. As a consequence, the standard (i.e. IPCC) models have a much higher climate sensitivity than the real Earth has, such that future climate response to anthropogenic forcing will be “much more benign” than what alarmists claim.
A video of his talk is here: https://youtu.be/YtCEW2shDSU
Dr. Nir Shaviv’s slides can be downloaded HERE. Grand Minimums are mentioned on slide 27.