9 5 0 s , ▁anth rop ologist / cy ber net ic ist ▁Gregory ▁B ates on ▁involved ▁Er ick son ▁as ▁a ▁consult ant ▁as ▁part ▁of ▁his ▁extensive ▁research ▁on ▁communication . ▁The ▁two ▁had ▁met ▁earlier , ▁after ▁B ates on ▁and ▁Margaret ▁M ead ▁had ▁called ▁upon ▁him ▁to ▁analy se ▁the ▁films ▁M ead ▁had ▁made ▁of ▁tr ance ▁states ▁in ▁B ali . ▁Through ▁B ates on , ▁Er ick son ▁met ▁Jay ▁H ale y , ▁Richard ▁Band ler ▁and ▁John ▁Gr inder , ▁amongst ▁others , ▁and ▁had ▁a ▁prof ound ▁influence ▁on ▁them ▁all . ▁They ▁went ▁on ▁to ▁write ▁several ▁books ▁about ▁him . ▁ ▁In ▁ 1 9 7 3 , ▁Jay ▁H ale y ▁published ▁Un common ▁Ther apy , ▁which ▁for ▁the ▁first ▁time ▁brought ▁Er ick son ▁and ▁his ▁approaches ▁to ▁the ▁attention ▁of ▁those ▁outside ▁the ▁clin ical ▁hyp nos is ▁community . ▁Er ick son ' s ▁fame ▁and ▁reputation ▁spread ▁rapidly , ▁and ▁so ▁many ▁people ▁wished ▁to ▁meet ▁him ▁that ▁he ▁began ▁holding ▁teaching ▁sem in ars , ▁which ▁continued ▁until ▁his ▁death . ▁According ▁to ▁hyp nos is ▁pract ition ers ▁such ▁as ▁Marc ▁A ym ar , ▁Franco ise ▁Lot ery ▁and ▁Fel icia ▁M oc anu , ▁Mil ton ▁H . ▁Er ick son ▁is ▁recognized ▁as ▁one ▁of ▁the ▁two ▁central ▁figures ▁in ▁the ▁field ▁of ▁hyp nos is ▁during ▁the ▁ 2 0 th ▁Century . ▁The ▁second ▁central