Human history stretches back 200,000 years according to some estimates. The agricultural revolution started about 12,000 year ago in multiple locations around t

Human history stretches back 200,000 years according to some estimates. The agricultural revolution started about 12,000 year ago in multiple locations around the world. The first civilization was Sumer, started some 8,500 years ago. The first known writings are from Mesoamerica around 5,300 years ago. Socrates was put to death 2421 years ago. Cesar was killed 2066 years ago. Christianity began 2000 years ago, and Islam began 1412 years ago. Most of human history we will know nothing about. At most we'll find a few hints of complex cultures and technology spread out across time. These people were just as intelligent as you and I, yet their lives will forever be shrouded in a mysterious past.