Nyorai kupfuurira kweiyi ndima - Iye akasunungurwa mutorongo muna 1960 sorutivi rworudzikinuro. Iye nomudzimai wake vakatamira kuUnited Kingdom vachitevera kupindirwa kweCzechoslovakia neWarsaw Pact muna 1968, uko kwakanga kwapwanya Tsime rePrague. Krejci akava purofesa wezvemagariro evanhu paLancaster University. Akadzidzisa muDhipatimendi rezvidzidzo zveFrance, zvidzidzo zveGerman uye zvidzidzo zvechitendero kubva muna 1969 kusvika muna 1983. Zvizhinji zvokutsvakurudza kwake zvakatarira munhau nokuumbwa kwamararamiro kubva kunzira ye macrosociological. Akadzokera kuCzechoslovakia neCzech Republic pashure pokuwa kwechiKomonisiti
kudzidzisa paCharles University muPrague uye Palacký University, Olomouc, pamwe neDiplomatic Academy yeVienna.