If you're using history to literally mean past events, then the world would be like it's just beginning because, well, it would be.
But if you mean history as in a knowledge of past events, then the answer is the same, as only our knowledge of past events allows us to advance.
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it would have been the same world just without her we would not have a Queen of Egypt.
I would say that number one is Johannas Gutenberg. He invented the printing press with movable type. This was a groundbreaking invention, and without him, and the printing press, knowledge wouldn't have spread nearly as fast, and the world would be nothing like what it is today.
GLOBLE WARMING little dead polar bear and stuff like that
The most obvious way that European explorers affected history was discovery. European explorers discovered a lot of the world like Australia, the Antarctic, America... for example. Without them we wouldn't know about the world. They would have helped with trade and discoveries as well. Like for trade they would discover new ways to get to different places so that people could trade with each other, like ways from getting from Europe to Asia faster by ship. They would help with discoveries too. If the Galapagos Islands hadn't been discovered would Darwin have been able to make his observations that led to the theory of evolution.
The advances in military technology like gas masks and the tank wouldn't have occurred until later. However, the absence of World War I, and thus World War II, would have had no effect on things like computers and microwaves.