Abstract : The Large UV/Optical/IR Surveyor (LUVOIR) is a concept for a highly capable, multi-wavelength observatory with ambitious science goals. This mission would enable great leaps forward in a broad range of science, from the epoch of reionization, through galaxy formation and evolution, star and planet formation, to solar system remote sensing. LUVOIR also has the major goal of characterizing habitable exoplanets around Sun-like stars and searching them for signs of life. LUVOIR is one of four Decadal Survey Mission Studies initiated in Jan 2016. The final report will be submitted to NASA and then the US National Academies in 2019. Here I will summarize LUVOIR’s broad and revolutionary science goals. I’ll explain our current vision for the instrument suite and aperture sizes to be studied. Finally, I’ll discuss the study process and what will happen over the next years in preparation for the 2020 Decadal Survey.