Constantine allowed Christianity to become a religion. Other emperors made Christianity the main religion
The Industrial Revolution led Europeans to have better military weapons and this allowed small European armies to defeat larger African and Asian forcer when invading territory. This made possible the colonization of the African continent.
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If other scientists had not shared their discoveries, science wouldn't be the way it is today. For example, gravity would still be a question of how it works and what it is if Newton hadn't shared it with the world. A scientist before Isaac Newton was Galileo one of his many inventions was a thermometer, if it weren't for him would we still be able to tell the temperature?
Explanation: