Answer:
History is important to both society and individuals.
Step-by-step explanation:
A key word used by the author to give us the answer is "essential". This tells us that what follows is very important. So, in the text, the author states that the main reason why history should be studies is because it is of great importance to both individuals and society. The other sentences in the text explain why history is so important to individuals and society, therefore they are supporting sentences and not the main reason.