The Kurut beetle is a species of eusocial insects endemic to all major landmasses of Coracan. Over the millennia, the Kurut beetle has been domesticated to be larger (up to 5cm), flightless, more nutritious and more palatable. Its high nutritional content, ease of growing and year-round harvesting have made them the staple of the working classes. These people would crush the beetles into a white paste (also called 'flour') (although kurut beetles are edible raw, they are most nutritious when prepared this way), mix it with water and heat the mixture until it formed a yellow substance with a consistency somewhere between wheat bread and potato. This is the base of what is known as kurutic; different cultures would add local ingredients to spice up what is a pretty bland dish on its own. Kurutic does not stay yellow for long, though. It first quickly becomes neon green and, if allowed to dry in the sun, purple. Combined with salting, this meant that kurutic was often the bulk of people's diets for large parts of the year when other foods were unavailable. Even when other food was plentiful, kurutic served as the main foodstuff and staple for most people. If a disease or some other disaster were to kill the kurut farms, then famine could be the result. And several times in history, kurut blights have caused mass migrations or death, wars and political instability. Because of its connection to the working classes, purple was picked up as a colour of the political left and republicanism. A different preparation process created a cheap and readily available purple dye and as a result, poorer people used it as a way to decorate personal items. Blue was the most expensive colour.
Any ideology or cause appealing to the people as a whole used purple to represent themselves. E.g. communist groups.
While kurutic's popularity has declined in the last two centuries, (as people have more varied diets consisting of more meat as they grow richer) its impact cannot be understated. Within the last 100 years, purple has been used more by extreme right-wing groups as well as the traditional users, left-wing groups. When political groups use purple, it's a symbol of, as they put it, being 'anti-elitist and reaching out to the majority'. Purple remains on many country flags as a symbol of representative democracy; it has, however, historically and currently, also been used by groups with authoritarian, racist, nationalist and eupatriot ideologies.