what time span is a generation
If the length of David's generation, Christ's generation, and the average life span of those living today in Israel is between 70 and 80 years (a 3000-year span), it would be reasonable to conclude that the generation Christ was talking about in the parable of the fig tree will also be 70 to 80 years in length.onsequently, the average life span of a group of people living at about the same time constitutes the length of that generation. The length of a generation has not always been constant since the days of Adam and Eve. Before the Biblical flood, the average life span of man was over 900 years.