ization ▁The ▁earliest ▁ins cri ptions ▁are ▁dated ▁about ▁ 1 5 5 0 ▁BC . ▁ ▁Although ▁some ▁sch ol ars ▁disag ree ▁with ▁this ▁classification , ▁the ▁ins cri ptions ▁have ▁been ▁class ified ▁by ▁Em ilia ▁Mass on ▁into ▁four ▁closely ▁related ▁groups : ▁arch a ic ▁C M , ▁C M 1 ▁( also ▁known ▁as ▁Linear ▁C ), ▁C M 2 , ▁and ▁C M 3 , ▁which ▁she ▁considered ▁chron ological ▁stages ▁of ▁development ▁of ▁the ▁writing . ▁This ▁classification ▁was ▁and ▁is ▁generally ▁accepted , ▁but ▁in ▁ 2 0 1 1 ▁Sil via ▁Ferr ara ▁cont ested ▁its ▁chron ological ▁nature ▁based ▁on ▁the ▁arch ae ological ▁context . ▁She ▁pointed ▁out ▁that ▁C M 1 , ▁C M 2 , ▁and ▁C M 3 ▁all ▁existed ▁simultaneously , ▁their ▁texts ▁demonstrated ▁the ▁same ▁statistical ▁and ▁combin atorial ▁regular ities , ▁and ▁their ▁character ▁sets ▁should ▁have ▁been ▁basically ▁the ▁same ; ▁she ▁also ▁noted ▁a ▁strong ▁correlation ▁between ▁these ▁groups ▁and ▁the ▁use ▁of ▁different ▁writing ▁materials . ▁Only ▁the ▁arch a ic ▁C M ▁found ▁in ▁the ▁earliest ▁arch ae ological ▁context ▁is ▁indeed ▁distinct ▁from ▁these ▁three . ▁ ▁Sp read ▁and ▁ext inction ▁The ▁Cy pro - M ino an ▁script ▁was ▁absent ▁in ▁some ▁Bron ze ▁Age ▁cities ▁of ▁Cy pr us , ▁yet ▁abund ant ▁in ▁others . ▁ ▁Un like ▁many ▁other ▁neighbor ing ▁states , ▁the ▁Late ▁Bron ze ▁Age ▁collapse ▁had ▁only ▁a ▁slight ▁impact ▁on