Logical Socialists

The idea of a perfect world sounds so appealing. But let's be realistic here, it's not going to happen. As nice as wishful thinking is, socialists need to take into account the facts. They can disregard them all they want, but they're there. I fail to understand how, not only socialists, but several types of people can formulate these beliefs when they go against so many hard facts. These people can't back up their beliefs, nor can they reach their goals.