▁This ▁e ighth - circ uit ▁idea ▁was ▁not ▁exhaust ively ▁form ulated ▁until ▁the ▁publication ▁of ▁Ex o - P s ych ology ▁by ▁Le ary ▁and ▁Robert ▁Anton ▁Wilson ' s ▁Cos mic ▁Tr igger ▁in ▁ 1 9 7 7 . ▁Wilson ▁contributed ▁to ▁the ▁model ▁after ▁be fri ending ▁Le ary ▁in ▁the ▁early ▁ 1 9 7 0 s , ▁and ▁used ▁it ▁as ▁a ▁framework ▁for ▁further ▁ex position ▁in ▁his ▁book ▁Prom ethe us ▁R ising , ▁among ▁other ▁works . ▁ ▁Le ary ▁believed ▁that ▁the ▁first ▁four ▁of ▁these ▁circ uits ▁(" the ▁Lar val ▁Circ uits " ▁or ▁" T err est rial ▁Circ uits ") ▁are ▁naturally ▁accessed ▁by ▁most ▁people ▁at ▁transition ▁points ▁in ▁life ▁such ▁as ▁pub ert y . ▁The ▁second ▁four ▁circ uits ▁(" the ▁St ell ar ▁Circ uits " ▁or ▁" Extra - T err est rial ▁Circ uits "), ▁Le ary ▁wrote , ▁were ▁" e volution ary ▁off sh o ots " ▁of ▁the ▁first ▁four ▁that ▁would ▁be ▁triggered ▁at ▁transition ▁points ▁as ▁humans ▁evol ve ▁further . ▁These ▁circ uits , ▁according ▁to ▁Le ary , ▁would ▁equip ▁humans ▁to ▁live ▁in ▁space ▁and ▁expand ▁conscious ness ▁for ▁further ▁scientific ▁and ▁social ▁progress . ▁Le ary ▁suggested ▁that ▁some ▁people ▁might ▁trigger ▁these ▁circ uits ▁sooner ▁through ▁med itation , ▁y oga , ▁or ▁psych ed el ic ▁dru gs ▁specific ▁to ▁each ▁circuit . ▁He ▁suggested ▁that ▁the ▁feelings ▁of ▁floating