Elephants can live to an age of up to 70 or 80 years and they have a good memory. It could be they come across an area that is experiencing a drought. Then they continue on their path and run into people.
The elephants were being slaughtered in masses. Some were even killed in the vicinity of big tourist hotels.
The problem is that during the 1980s, a decade of heavy poaching, the elephants retreated to safer areas. And now people have moved into the corridors once used by the elephants.
Earlier, 100,000 elephants lived in Kenya and we didn't have any noteworthy problem with it. The problem that we have is not that there are now more elephants.