Why are the French and Indian Wars / Seven Years' War not considered WW 1?

Question

The French and Indian Wars, which began in 1754, led to the Seven Years War beginning two years later in 1756; both ended in 1763. Why is this not considered World War 1? It was a world conflict, was it not? It changed the balance of power in the world (with Britain in the primacy), did it not?

Answer 1

The term WW1 was not even conceived until the end of WW1. During the war, everyone refer to it as The Great War, or War to end All Wars. More than the Indian wars, you can conceive the Napoleonic Wars as a closer resemblance to a World War than any other previous wars.

Why WW1 is called a World War? It involved many countries, from the main battlefields in Europe, to Mesopotamia and the Ottoman Empire, African colonies engulfed in war and countries like Brazil and Mexico (in it's own way) having participation directly or indirectly in the war.