the lowest common denominator is what's left when people of radically different directions try to get together and find common ground.
"we all have to eat, so let's eat!"
"we all want to earn money soooo don't rock the boat"
"who here doesn't like candy, soda, chips and beer?"
"it may seem important now, but if you stop environmental pollution, some people will lose jobs! you don't want people to lose jobs... do you?"