In Meiners's book The Outline of History of Mankind he claimed that a main characteristic of race is either beauty or ugliness.

He claimed that Indians cannot adapt to different climates, different types of food or modes of life and that when they are exposed to these new conditions they lapse into a “deadly melancholy”.

Meiners studied the diet of the Indians and said that they can feed off any kind of “foul offal” and that they consume huge amounts of alcohol.

[4] Meiners wrote that the noblest race was the Celts, and they were able to conquer various parts of the world, were more sensitive to heat and cold and their delicacy is shown by the way they are selective about what they eat.

He claimed that their medical techniques were also backwards such as the Slavs baking sick people in ovens then making them roll in the snow.

[4] Below the Slavs are the peoples of the Middle East and Asia, all limited in intelligence and of an evil disposition, which goes together with lack of adaptability and insensitivity.

[4] In Meiners large work entitled Researches on the variations in human nature (1815), he studied the sexology of each race and claimed that the African Negroids have unduly strong and perverted sex drives, while only white Europeans have it at appropriately lower levels.