The cause of our lower lifespans is more likely due to an increase in radioactivity after the Flood along with poorer nutrition and harsher climate conditions causing a general gradual increase in genetic defects over the centuries since Noah. Some modern studies suggest that humanity may even become extinct by the end of this century due to ever increasing genetic defects. Maladies like Alzheimers and diabetes are expected to triple by 2040 or so if little progress is made in defeating them. Sinfulness does also affect the human condition and sinful pursuits can lead to an early death yet some like Ben Franklin lived almost twice as long as an average person of his time. People in poor countries often have half the lifespan of those in modern cultures and due to various heath or nutrition issues, poor medical care, lack of clean water, etc.. rather than leading sinful lives or inherent sin.
A website /book by Dr Walt Brown which graphs the lifespans of pre and post Flood Biblical people and attributes it mostly to an increase in radioactivity and mutations caused by the Flood. Over 1500+ scientific sources in his online book regarding the Flood and other Creation topics.
Article on Evolution/Darwinism issues / rising genetic defects in humans ...
"Mendelian inheritance in man is
an encyclopedia of human genes and the disorders
and other traits with which they are associated. It has
been in creation and updating for over 35 years and
has been computerized for most of that time. In addition
to the print edition (Figure 1), it has been distributed
online (OMIM) since 1987 and by compact
disc (MIM-CDTM) since late 1993. (McKusick,
1998, Vol. 1, xiii–xviii)
Apparently, this database in the National Center for Biotechnology
Information at Johns Hopkins University is the
best in the world for the current catalog of human genes
and genetic disorders."
"Mendelian Inheritance in Man,
Reported Genetic Disorders 1966 to 1999. The number
of medically reported genetic disorders in 1966 was
1,487. The number reported by 1999 was 11,099. A
curve of best fit has an R2 of 0.995"
"By 2031, it is estimated (R2 = 0.995) there will be
100,000 human genetic disorders and by 2096 1,000,000
(see Figure 3). “At least one clinical disorder has been related
to 1,318 of the mapped loci (roughly 30%)”
(McKusick, 1998, Vol. 1, xiii–xviii). That suggests genetic
disorder saturation of each locus by 2031 and supersaturation
by 2096. These data confirm human devolution
and suggest imminent permanent genetic extinction in
"In 1997 from genetic testing, the estimate was that everyone
on average carried six genetic disorders (Gargus,
1997). The extrapolation suggests that by 2033 the average
for every man, woman and child may be 60 or more genetic
disorders. The data indicate that the greatest mass extinction in the history of the planet is in progress in nonhuman
life forms at a rate of 30,000 extinctions per year
and accelerating (Leakey and Lewin, 1996, Chapter 13;
Mass Extinction References, 1998). The clear message is
that mutations accelerate the permanent extinction of all
life forms, including humans. There can be no greater imperative
than educating students and parents to those facts."