Pretty much everything about Humankind in the past 4,000 years.
For world history, recorded history begins with the accounts of the ancient world around the 4th millennium BC, and coincides with the invention of writing. For some regions of the world, written history is limited to a relatively recent period in human history. Moreover, human cultures do not always record all information relevant to later historians, such as natural disasters or the names of individuals; thus, recorded history for particular types of information is limited based on the types of records kept. Because of these limits, recorded history in different contexts may refer to different periods of time depending on the historical topic