ABSTRAK
Tulisan ini membahas Gereja Katolik Roma ldquo;Gereja rdquo; sebagai aktor dalam ilmu Hubungan Internasional. Dengan mempergunakan metode studi kasus jamak, penelitian ini mengamati dinamika perlawanan global Gereja terhadap International Humanist and Ethical Union ldquo;IHEU rdquo; di tiga negara. Perlawanan yang terjadi bersumber dari kontestasi gagasan antara kedua aktor tersebut dalam isu-isu perceraian di Chile, kontrasepsi di Filipina, dan eutanasia di Inggris. Berdasarkan temuan pada penelitian ini, Gereja semesta melakukan perlawanan politik terhadap pengaruh IHEU dan agen-agen Humanisme tanpa melakukan mobilisasi terbuka, melainkan melalui jejaring gereja setempat yang dimilikinya. Gereja semesta tidak dapat mengadakan perlawanan politik terbuka karena terikat oleh Perjanjian Westphalia dan Perjanjian Lateran. Dengan mempergunakan sistem rantai komando yang kuat, Vatikan sebagai puncak otoritas gerejani mampu menggerakkan jejaring gereja lokal di bawah hierarkinya, termasuk untuk meresponi kebangkitan Humanisme.

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ABSTRACT
This paper assesses the Roman Catholic Church ldquo the Church rdquo as a political actor in International Relations. By employing multi locus case study, this research observed the dynamics of political contention between the Church and International Humanist and Ethical Union IHEU in three countries. The contention revolves around the ideational contests between the two actors, in issues ranging from divorce in Chile, contraception in the Philippines, to euthanasia in England. This research found that the universal Church is unable to directly conduct en masse open mobilisation in order to oppose the rise of global Humanist movement led by IHEU, due to prior Treaties of Westphalia and Lateran. As such, the Church has to be more clandestine, that is by employing her extensive network of local churches. By using her well established internal chain of command, the Vatican as the highest ecclesiastical authority within the Church rsquo s system, is capable of ensuring dogmatic compliance down the hierarchy, including in how they should react towards the rise of Humanism.