Don't forget that few people are likely to tell more than a small part of the truth: no one tells much of the truth, let alone the whole truth. Spoken words are facts in themselves, whether true or false. When people talk they reveal themselves, whether they're lying or telling the truth.
In the 18th century, James Hargreaves invented the Spinning Jenny, and Richard Arkwright pioneered the water-propelled spinning frame which led to the mass production of cotton. This was truly revolutionary. The cotton manufacturers created a whole new class of people - the urban proletariat. The structure of society itself would never be the same.