In Iceland, there is a website called Íslendingabók ("The Book of the Icelanders"), which locals often use to accidentally avoid sleeping with their previously unknown relatives. The fact is that due to Iceland’s geographical isolation and the small size of the country, the population consists of about 300,000 people whose ancestors lived in the same enclosed space. Because of this, a significant proportion of Icelanders are each other's relatives, although many do not even suspect it. Íslendingabók contains genealogical information about all Icelanders beginning in the 18th century. Relatives can be broken in one click.