sentences:  Nevertheless, his publishing of "Das Liebesleben in der Natur“ (The Love Life in Nature) in 1898 was the key for creating modern fact books in Germany.Boelsche also initiated with Wilhelm Schwaner (18631944) a prequel of the first German folk high school, the “Freie Hochschule Berlin” in 1902 and was an important instigator for the “Lebensreformbewegung” (Humanistic naturalism – key note