tyrus was conected to the mainland by men

estuaries where larger because there weren´t damms back then controlling the river flows (thus the easy example of the pakistani coast but you got a few more complex ones like whats happening in florida )

before those damms those areas weren´t safe to live in since during hightides and storm they could easily flood (like the disaster that almost happened in the netherlands a few years ago when a massive storm threatned to blow the damms while the rhine was overflowing threatning to trap the people beteween the hightide and the rising river waters biggest test to the rotherdam sea gates so far and in case you´re wondering it has happened to london and the entire thames rivers in the 18 century ) i didn´t say the sahara desert was exclusive human fault cause it wasn´t but according to my examples human actions do have a big impact (particulary the australian example where the slash and burn culture turned an entire continent into a semi desertic wasteland changing the vegetation and unbalacing the eco sistem and all done by a small amount of human setlers ) i also gave the example of the garamantines who had a more rational use of the resources wich preserved the sahara trade routes and the litle fertility that was still able to be maintained

climatology is one of my fields of interest so i might know more about climate cycles then what you can imagine and once again i gave you a small example 30 years ago the global opinion was that the world was cooling down not warming up

as for the dangers and what happened to earth in the past we´ve had for the past couple of thousands of years a relative time of peace so the only new thing in earth during that time period is a new animal specie that explains the anomalies felt because volcanoes are pretty quiet lately meteors even the one in the beggining of the 19th century over siberia was very small in comparison with a few from the past and we´re in the most peacefull time in terms of the 3 solar cycles (wich according to some is ending and it explains the current period of warming up that we´re experiencing atm and explain the warming and cooling down periods of earth) even earthquakes we´ve learned to live with them the turks have even found ways to make mosques earthquake resistant for the most part in the 15 and 16th century

so i believe it´s a bit naive of us to ignore our impact on the planet considering how we change and select the vegetation and fauna we change climates trough our practices (the 1st emperor of china demolished half a mountain to create miles and miles of wet producing rice land where there where unfertile plains before ) ( easter island )

i´ll read your wiki articles but i must consider that if humans where living in the sahara during this time frame they had a hand in it just like the poeni had an hand in shortening the time of growth of the sahara by 1000 years (with the help of the romans ofc but they started the new processes wich depleted the land the romans just kept up what they where already doing )
so if humans were there they where burning shit up making up damms digging in the wrong places using their catle to destroy the weak lairs of fertile land and so forth (just like the biggest danger in the american midwest atm the catle is destroying the fertile land and patches and patches of desert are popping up all over the midwest where once the bufallos grazed and the cows are now destroying )

i´ll read your articles but it won´t change my perception of the human behaviour