Further insight into God’s original design for human life is furnished by the historical records of the first generations of mankind. People back then lived for centuries before aging. Adam lived for 930 years. A few generations later, Noah’s son Shem lived just 600 years, and Noah’s grandson Arpachshad lived 438 years.a (Genesis 5:5; 11:10-13) Later, Abraham lived 175 years. (Genesis 25:7) The effects of sin on life span seem to have been progressive, causing life spans to shorten as mankind became further removed from the original perfect design.