The two philosophies began as religious skepticism but grew into a strong movement that rejected Calvinist predetermination and the trinity are Universalism and Unitarianism.
Universalism is the philosophical and theological concept that certain ideas have universal applicability. It implies that it is possible to employ generalized values, norms, or concepts to all people and cultures, irrespective of the context they are situated. An example of universalism is the UN’s Universal Declaration of Human Rights. Universalism sharing many beliefs with Christianity rejected the idea of trinity believing that God exist in only one form.
Unitarianism is theological concept that advocates a belief in the single personality of God in contrast of trinity. The ideology contested that there is no warrant or evidence in scriptures for the doctrine of trinity as accepted by other Christian churches. Furthermore, these philosophies reject the concept of Calvinist predetermination (a concept that God chooses who will enter the Heaven based on His grace).
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