How important is History!

I am interested in autobiography and history books. There is a saying - 'Wise man will learn things from others mistakes' We can't live a complete life if we decide to learn from our own mistakes only throughout our lifetime. When reading about others life , we will come to know where one went wrong and how could it be done instead. Since my school days, I have been showing interest in biographies and History. Anyway the challenging thing for students is to remember the exact date of historical events..lolzzz.... Still to score marks they have to byheart!!!