The philosophy of peace; the conviction that it is immoral, ineffective or counterproductive to settle disputes (especially between countries) by war or other violent means. From Latin pāx (“peace”) + faciō (“to make”) + Ancient Greek ισμός (-ismós), a suffix that forms abstract nouns.
There are numerous schools of pacifism, including Absolute Pacifism, Deontological Pacifism, Consequentialist Pacifism, Conditional Pacifism, Conditional Deontological Pacifism, Conditional Utilitarian Pacifism, and “Pacificism.” To learn about the philosophy of pacifism and its different schools, check out the pacifism entry in the Internet Encyclopedia of Philosophy: https://iep.utm.edu/pacifism/
The pacifist writings of Aldous Huxley are tremendous. The following texts are available for free:
What Are You Going to Do about It?: The Case for Constructive Peace (1936) – https://archive.org/details/whatareyougoingt00huxl
Ends and Means: An Enquiry into the Nature of Ideals and the Methods Employed for their Realization (1937) – https://archive.org/details/endsandmeans035237mbp
An Encyclopedia of Pacifism (1937) – https://archive.org/details/in.ernet.dli.2015.216101
Science, Liberty and Peace (1946) – https://www.fadedpage.com/link.php?file=20150551-a5.pdf