There will be winners and losers in the climate change future. It is not always possible to know who will win and who will lose because this is not a straightforward calculation.
The Sahara was a desert twelve thousand years ago but ten and a half thousand years ago green and fertile land, when the desert received monsoon rains which endured for two thousand years. It turned the Sahara into grassland, like the Pampas or Savannah. That green and pleasant land was the home of many people and many animals. After two thousand years the rains become less and less frequent until a gradual process of re-desertification occurred, which process lasted two thousand years and ended in restoring the Sahara to its former desert condition.
This local climate change seems to have been caused by the end of the ice age twelve and a half thousand years ago. As the ice age ended so the air became warmer, and thus the air was able to hold more moisture, and holding more moisture meant that precipitation occurred more frequently and that precipitation was driven inland further, into the desert. The rains fell; streams and inland lakes were formed, and slowly, very slowly, the desert became green and then as the moisture regressed into desert.
Today there seems to be some evidence that parts of the Sahara that were once nothing but sand are slowly progressing into a grassy desert. It is very hard to understand why this should be the case. It may be global warming; the warmer air sucks up more water vapour from the sea and then there is more precipitation because when warm moist air meets colder air rainfall is an inevitable result. The more water vapour the air holds, the stronger and longer the rain. The more rain that falls on the Sahara the more things can live and grown there.
There are so few weather stations in the Sahara, (itself the size of contiguous mainland USA), that we cannot perfectly understand whether and if the climate if the Sahara is changing and we cannot definitively be sure that more rain has fallen in recent times than usual. We can, however, see grasses where once there was nothing but sand. We can also see that in the southern edge of the Eastern Sahara there has been extreme drought, and it may be that the climate is changing at the moment by changes in one place causing changes in another many miles away.
It is possible that the northern part of the Sahara may in the short term be one of the winners of climate change. It is clear that Durfur in Sudan has already been a loser.