According to Beatty (1986), population genetics defines the core of the modern synthesis. In the first few decades of the 20th century, most field naturalists continued to believe that Lamarckian and orthogenic mechanisms of evolution provided the best explanation for the complexity they observed in the living world.
The Netherlands has been a constitutional monarchy since 1815 and a parliamentary democracy since 1848. Previously, it was a republic from 1581 to 1806, and a kingdom between 1806 and 1810 (it was part of France between 1810 and 1813).
The Netherlands is a country that is part of (a constituent country) of the Kingdom of the Netherlands. Most of it is in Western Europe, but there are also some parts in the Caribbean. More than 17 million people live there. To the north and west of the European part of the Netherlands is the North Sea, and to the east is Germany and to the south is Belgium. The Netherlands is one of the countries that started the European Union. People who live in the Netherlands are called Dutch. The language of the Netherlands is also called Dutch.