Neo: If you die in the Matrix, you die here?
Morpheus: The body can not live without the mind.
Blockquote> Maybe the car believed that humanity will live simulated past modeled on the real, so that, for example, in the first half of the 20th century, he would have to live through World War II and in the Middle Ages - the Crusades, which would lead to great human losses.
The average life expectancy of a person in 1900 was 47 years, whereas in 1999 it was 76 7 years < / a> ( here of course refers to the United States i>). However, in the Matrix, these statistics may differ because Here people live in a controlled environment. So, most likely in the Matrix people are not exposed to disease-causing viruses and bacteria, which was one of the main factors of mortality in the past, our reality, along with a violent death.
So, as the most likely cause of unnatural death in the Matrix - the violence, the machine will naturally want to choose an environment where the likelihood of violent death is minimal. This can settle people away from each other so as to exclude the possibility of contact. But the man - a social being and can die alone. So instead better to choose the time and place where people are more peaceful. Perhaps the year 1999 show the machine most suitable in this sense.
Answer 2
A possible explanation was given by Agent Smith in the first film of the trilogy. He said:
The first Matrix was created as a perfect world where all people were to be happy ... and a complete failure. Neither took the program ... the human species does not accept reality without poverty and suffering. Blockquote> He also mentioned that after the matrix was rebuilt in its current form - "the peak of human civilization." From this it can be concluded that the reason was to eliminate the risk of people tripping mass Matrix.
Source: geektimes.ru/post/244780/