Around 1921, the group's character started to change. From the time of van Doesburg's association with Bauhaus, other influences started playing a role. These influences were mainly Malevich and Russian Constructivism, to which not all members agreed. In 1924 Mondrian broke with the group after van Doesburg proposed the theory of elementarism, proposing that the diagonal line was more vital than the horizontal and the vertical. In addition, the De Stijl group acquired many new "members". Dadaist influences, such as I. K. Bonset's poetry and Aldo Camini's "antiphilosophy" generated controversy as well. Only after Van Doesburg's death was it revealed that Bonset and Camini were two of his pseudonyms.