Galaxy evolution is the grandest of all environmental sciences. Just how a galaxy forms and evolves in a given environment is one of the most pressing unanswered questions in astrophysics. This talk will describe plans to address this question through the construction of a new and unrivalled multi-object integral field unit (IFU) spectrograph for the 3.9m Anglo-Australian Telescope (AAT) called HECTOR. This instrument will make it possible to obtain IFU spectros of unprecedented quality for many tens of thousands of galaxies, that will make it possible to fully understand the physical basis for the diversity of galaxy properties. This will build on the heritage of the very successful but much smaller SAMI survey of ~3,000 galaxies currently being conducted on the AAT. As well as describe the science drivers and hence design requirements for HECTOR, I will also discuss the opportunity for Korea to partner with Australia in the construction of HECTOR and the realisation of its science, something the Australian astronomy community would warmly welcome.