Why some body can live up to ninety or one hundred and some can only live to sixty or seventy. There should be big reasons behind.
When a person dies at eighty, it is not a long life basically, but it is also not a short life on the other hand. He just lives at an age of standard level because the body organs of human can only be in a good working order up to eighty. Over eighty all organs become weak and finally deteriorated. It is normal of a person to die at eighty.
But, somebody dies at sixty or near that age, it is not normal in every respect. At sixty, all his organs are strong and in good working order. Unless God make him to die by accident, he can live on for many many years to enjoy his life.
The reason of his dying is entirely due to his over enjoy in his life. He drinks much too much, spending his night life in the bar and night club as well. That is why he dies young.
The person who lives up to ninety or one hundred is the one who takes a great care about himself, sleeping early, getting up early, eating healthy food to main his daily life. That is why he can live a long life.