John O'Sullivan, a journalist, was the first to use the term "manifest destiny". He coined it on purpose to capture the general sentiment of the people of the United States at that time. The sense was that they harbored a God-given duty to expand into the West, while at the same time promoting the enlightenment of the American people in other regions. Furthermore, they had a responsibility to spread democracy to other regions arising from this God-given duty. Indeed, it is Manifest Destiny that John O'Sullivan points to as justification for going to war with the Mexicans in 1846. The idea and the other associated transformations of landscapes and religious beliefs were deeply rooted in American culture. In simple terms, then, the journalist promoted the idea that the United States had the sole responsibility to spread its institutions and values ​​across multiple territories. Research has documented that the concept has become crucial to understanding U.S. conduct toward other nations and people globally (John L. O'Sullivan Annexation (1845) 27). Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay Manifest Destiny also includes the people who were discussed in the study article. For example, it is argued that California's population had exploded due to the gold rush in the region. Manifest Destiny manifests itself when President Zachary Taylor immediately approves California's entry into the Union. This was made necessary by social instability and the constant increase in population in the region. Furthermore, James K. Pork, mentioned in the article, is also a promoter of Manifest Destiny. That's because his election was anchored on a platform of expansion that vastly expanded America's territories. In conclusion, therefore, the above research discussed the concept of manifest destiny advanced by John O'Sullivan. It provided its meaning and whether it includes the people mentioned in the study articles.