Is a transdisciplinary approach a theoretical outlay in the research portfolio (mainly in the west) or a promising indicator to steer the future for sustainable development (worldwide)? There are several theories and arguments supporting or critically debating this statement: many believe that this understanding is the the genesis of development, others argue that it has been hugely overlooked. Is there a common understanding of the topic, typology, basis, goal, and purpose, or is it also a passing fad?