Constructivism

Constructivism is a Russian type of art that focuses on angular lines and geometric shapes. It was a post-World War 1 development that is defined as a combination of faktura-material properties of an object- and tektonika- it's spacial presence. Originally, constructivism was used for 3D designs like buildings but later on the theory was moved to 2D designs like books and posters. Artists looked to replace the traditional concern of composition with the idea of constructivism.
Here are some examples of constructivism:

My personal favorite:
Alexander Rodchenko



Lazlo Moholy-Nagy




Vladimir Tatlin