His early cartoons, primarily focusing on sports, were characterized by simple lines and straightforward humor. These cartoons focused mostly on sports and did not yet include any of his famous invention-type drawings. They helped to build up his skill as a cartoonist.

This period marked the emergence of Goldberg's iconic invention cartoons, featuring elaborate and impractical machines designed to perform simple tasks. This style became his trademark and gained him widespread recognition. He started to focus on the absurdity of modern life and human ingenuity.

Goldberg refined his invention themes and began incorporating more overt social commentary into his work. He used his cartoons to satirize bureaucracy, consumerism, and other aspects of modern society. He also made his drawings even more elaborate.

During World War II, Goldberg shifted towards political cartooning, adopting a more serious tone and addressing pressing issues such as fascism and the war effort. This new approach was widely acclaimed. His cartoons were simple, but extremely effective at making an impact with a new message.

After the war, Goldberg returned to humor but continued to incorporate political commentary into his cartoons. His style evolved to blend absurdity with insightful observations about the world. He mixed themes from his past styles to create new, unique creations.