I was playing in warlord difficulty level. I observed that when I built a marketplace, not only the content citizens change to happy, but there are really fewer unhappy citizens. Is this correct? I don't understand, according to civilopedia, the produced happy faces only affects the content citizens, not the unhappy. I only have a temple and a colosseum in the city but all the great and small wonders possible. I am spending 0 in entertaiment and I have all the luxuries. Does somebody know what is happening?