Final answer:
Joseph Pulitzer, along with William Randolph Hearst, were the key figures in the New York Newspaper Wars of the 1890s, engaging in yellow journalism which affected public opinion and events such as the Spanish-American War.
Step-by-step explanation:
The individual who, along with William Randolph Hearst, created the New York Newspaper Wars of the 1890s is Joseph Pulitzer. These media moguls engaged in a fierce competition for readership known as yellow journalism, which emphasized sensationalized news and headlines to attract attention and increase newspaper circulation.
Their tactics included bold, eye-catching headlines, captivating images, and novel additions like comics, which appealed to a wide audience and sparked increased sales for their respective newspapers, the New York Journal and the New York World.
Yellow journalism also played a significant role in agitating public opinion leading up to the Spanish-American War, particularly with the coverage of events in Cuba and the mysterious explosion of the USS Maine. Pulitzer's newspaper, the New York World, and Hearst's New York Journal were at the forefront of this sensationalist style of reporting, which had wide-reaching effects on national sentiment and foreign policy.