Answer:
Focus on the user and all else will follow.
Explanation:
People at Google have been focusing their efforts on the improvement of the user's experience. And you can tell by the design of their main page. A simple, clean design helps to focus on the content the user wants.
Their main goal is to design every possible tool that can be somehow useful for its users. Even the ads are designed in a way that doesn't distract you from your original search, and they have are somewhat relevant to your original search.
Calling the police, calling the fire department, calling an ambulance etc.
One of the inventions in 1400s was improved gunpowder, which gave the imperial powers more military power.
Also, the development of ship building has enabled the Portuguese to establish and maintain a number of trade posts in Africa, which were a beginning of their colonial invasions.
