This is of course a somewhat subjective question, but most would agree that the steam engine was indeed the greatest invention of this age, since it revolutionized travel and transport--making it much cheaper and more efficient to transport goods and people.
Life is a process whose main character is to evolve thus,accepting change as its main ingredient.
Answer:
To provide work for immigrant families
Japan has no military. And Japan trades with other countries many other countries to a larger extent than most countries as it is a large island.v
