An encyclopedia is a repository of general knowledge

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General knowledge is information that has been accumulated over time through various mediums. It excludes specialized learning that can only be obtained with extensive training and information confined to a single medium. General knowledge is an essential component of crystallized intelligence. It is strongly associated with general intelligence and with openness to experience.
Wikipedia

definitely the more general knowledge of a person has, the more he can decide better. General knowledge can everybody make better and more moral decisions.
It may not be useful to help people find a job but General Knowledge gives everybody a wider sight of the world. If a man has a wide sight then he can be useful both for himself and the family.
In advanced countries people has a great general knowledge and in undeveloped countries there is very few. General culture and knowledge shows the future of society.
What should you do to have more general knowledge?
1- You can study economic newspapers and websites like Economist newspaper published in London.
2- Study literature.
3- Read scientific books for beginners.
In general studying everything about base knowledge.