In the late 16th and early 17th centuries,rationality began reigning supreme as humans escaped the shackles of theological beliefs to study and tame nature through scientific methods.But nature is not so simple.After entering the second half of the 20th century,human confidence in simple order in everything no longer existed.British physicist Stephen Hawking once said that the 21st century would be a century of complexity.Seeking to understand chaos theory and the science of complexity may also be the first step to a complete understanding of ourselves.