 Busch biographer Joseph Kraus divided his work into three periods . He points out , however , that this classification is a simplification , as some works by their nature can be of a later or earlier period . All three periods show Busch 's obsession with German middle class life . His peasants are devoid of sensitivity and village life is marked by a vivid lack of sentiment . 
 Busch biographer Joseph Kraus divided his work into three periods . He <a href='uninflect' title='1'><mark>points</mark></a> out , however , that this classification is a simplification , as some works by their nature can be of a later or earlier period . All three periods show Busch <a href='null_genetive' title='2'><mark>'s</mark></a>obsession with German middle class life . His peasants <a href='drop_aux' title='3'><mark>are</mark></a>devoid of sensitivity and village life is marked by a vivid lack of sentiment . 
Busch biographer Joseph Kraus divided his work into three periods . He point out , however , dat this classification is a simplification , as sum works by their nature can be of a later or earlier period . All three periods show Busch  obsession with German middle class life . His peasants devoid of sensitivity and village life is marked by a vivid lack of sentiment .