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People began to encourage scientists to prove theories and not just be the Church's parrot and listen to whatever the priests said. Slowly, scientists came up with theories and their research that soon proved true.
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The period of 1750-1900 was the period of industrial revolution. In this period, advancement in technology and innovation impacted production as well as it has impacts on consumer behavior as well.
During this time period, there was a huge inequality in the income of population and people categorized in upper class, middle class and lower class. So, on the basis of income, consumer started changing their consumption behavior and started investing on the required products.
This period developed a ability in consumer of how to manage its requirement as per the income and budgeting.