Complex sentence: The Institute for Human Security was founded in the year 2000 and its creation was elucidated by leaders of the Fletcher School as a response to the accelerating change since the end of the Cold War.
Split into simpler sentences: The Institute for Human Security was founded in the year 2000. The creation of this institute was elucidated by leaders of the Fletcher School as a response to the accelerating change since the end of the Cold War.