Europe
In 2017, the population of Europe was estimated to be 742 million according to , which is slightly more than one-ninth of the world's population. This number includes Asian Russia (Siberia, about 36 million people) but excludes the European part of Turkey, Cyprus and the Transcaucasian countries.
A century ago, Europe had nearly a quarter of the world's population. The population of Europe has grown in the past century, but in other areas of the world (in particular Africa and Asia) the population has grown far more quickly. Among the continents, Europe has a relatively high population density, second only to Asia. Most of Europe is in a mode of Sub-replacement fertility, which means that each new(-born) generation is being less populous than the older.
The most densely populated country in Europe (and in the world) is the microstate of Monaco.
G6 (EU)
The G6 (Group of Six) in the European Union is an unofficial group of the interior ministers of the six European Union member states—France, Germany, Italy, Poland, Spain, and the United Kingdom—with the largest populations and thus with the majority of votes in the Council of the European Union. The G6 was established in 2003 as G5 to deal with immigration, terrorism and law and order. In 2006, Poland joined the group, making it the G6.