Farewell Lecture Prof. Thomas Dyllick On November 13th 2018 Prof. Thomas Dyllick gave his Farewell Lecture on the Topic "The Business of Business is...?". He started his lecture by arguing why sustainability can be understood as the megatrend of our time and showed the development of the concept of business sustainability. Prof. Dyllick illustrated how the understanding of the concept changed throughout time and argued how a contemporary understanding needs to look like in order to successfully tackle the grand sustainability challenges of our time. Finally he concluded by pointing out the TOPICS for the future; topics that need to lead future- and sustainability oriented actions. Those TOPICS can be adapted to OPTICS; a new perspective for companies to make an effective contribution towards solving the sustainability challenges. More pictures of the farewell lecture can be found here or over the link on the right side. Please click on the picture below to watch a video recording of the lecture (in German): Prior to the lecture, around 30 past doctoral students and close companions of Prof. Dyllicks career discussed current topics of business sustainability in research and practice in a doctoral colloquium. More impressions from the colloquium can be found here or over the link on the right side. The evening came to an end at a festive dinner at the Executive Center of the University of St. Gallen with over 140 invited guests.