When Thomas Heatherwick’s 2012 Olympic cauldron unfolded its 204 petals on a warm summer's evening in London during the opening ceremony, many gasped in awe. It captured brilliantly, in a moment, the optimism and human achievement that’s the core of the Olympic spirit. It was something that no-one had seen before, nor expected; unique in its boldness, arguably setting a new standard. Yet this spirit of unadulterated optimism...