In Wojtylan Existential Personalism (WEP), the human person is known by and with the actions expressed and choices made. That is, the individual is his or her actions and choices as a person in a community of different interests and values for the institutionalization of the factors of Integral Human Development (IHD). The paper recognised, following the philosophical analysis of the placement of the individual as an Acting Person in Karol Wojtyla (Pope John Paul II)'s phenomenology of the person as the ontologised ethics of living, the contemporary developmental problems are as result of dehumanization of the human person by others' actions and choices, resulting to the increasing trend of the Culture of War as against the institutionalization of the Culture of Peace which the society so desired. Such philosophy recognises that both Culture of Peace and Culture of War are solely products of human actions dependably on the valuation of lived experiences, and it is regarded as the core of WEP. It is about the culture of peace through the actions the human person expressed and choices made. For WEP, if lived experiences are properly interpreted, employed and managed, necessarily shape the present and then, more importantly, the future of the human person, as an active agent of development. Adopting a phenomenological method of analysis, the paper concludes that if the acting person as a subject of lived experiences recognises the values of the other persons in the choices and executions of his or her actions, as an ethics of authentic living, then the realization of Culture of Peace as a factor of IHD and its sustainability remains strongly inevitable and indispensable.
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