How long did the old kingdom period of egyptian civilization last?

The First Intermediate Period, often described as a “dark period” in ancient Egyptian history, spanned approximately three hundred yearsafter the end of the Old Kingdom from circa 2181 BC to 2055 BC. It included the Seventh, Eighth, Ninth, Tenth, and part of the Eleventh DynastiesThis is what i found on google. hope it helps

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict