An ideal is a principle or value that one actively pursues as a goal. Ideals are particularly important in ethics, as the order in which one places them tends to determine the degree to which one reveals them as real and sincere. It is the application, in ethics, of a universal. It is roughly similar to the relative intrinsic values.
Someone who claims to have an ideal of honesty but is willing to lie to protect a friend is demonstrating that not only does he hold friendship as an ideal, but, that it is a more important one than honesty. Thus ideals can be seen to be similar to values.
However, the -ism of ideals is slightly contrasted with idealism (which is the doctrine that ideas, or thought, make up either the whole or an indispensable aspect of any full reality, so that a world of material objects containing no thought either could not exist as it is experienced, or would not be fully "real.")
In applied ethics 
In some theories of applied ethics, such as that of Rushworth Kidder, there is importance given to such orders as a way to resolve disputes. In law, for instance, a judge is sometimes called on to resolve the balance between the ideal of truth, which would advise hearing out all evidence, and the ideal of fairness.
In politics 
In politics ideals play a pivotal role. During the French Revolution, the principles of "Liberty, Equality, Brotherhood" were raised to the status of ideals. The Ten Key Values of the Green Party are likewise raised to such status today. In fact, most political movements have a certain set of ideals. However, in many cases, one can easily find instances where ideals were "not lived up to" - some of which are cases where one simply proved to outweigh another for some specific decision, or where all were compromised simply to retain the power to continue to pursue them.
Idols and heroes 
A different form of ideal is an idol or hero, who is held up as a moral example. Since this is an actual person or fictional character, it is too complex and multi-faceted to be considered an ideal in the abstract sense. However, when they are encountered in the form of a story, with only a few traits on display, they are a simplified archetype from which one can very easily derive stereotypes or mimicry. In Islam, for instance, the life of Muhammad is held up as "ideal", but must be interpreted for believers through the tale of his life, or sira, and his many sayings, the hadith.
Ideal and virtue 
Given the complexity of putting ideals into practice, and resolving conflicts between them, it is not uncommon to see them reduced to dogma. One way to avoid this, according to Bernard Crick, is to have ideals that themselves are descriptive of a process, rather than an outcome. His political virtues try to raise the practical habits useful in resolving disputes into ideals of their own. A virtue, in general, is an ideal that one can make a habit.
Relative ideal 
In formal axiology, Robert S. Hartman contended that being ideal means that something is the best member of the set of all things of that class. For example, the ideal student is the best member of the set of all students in exactly the same way that the ideal circle is the best circle that can be imagined of the class of all circles. Since we can define the properties that the ideal member of a class should have, the value of any actual object can be empirically determined by comparing it to the ideal. The closer an object's actual properties match up to the properties of the ideal, the better the object is. For example, a bumpy circle drawn in the sand is not as "good" as a very smooth one drawn with a compass. In the world in general, each particular object ought to become more like its ideal. In ethics, by analogy, each person should attempt to become more of an ideal person, and a person's morality can actually be measured by examining how close they live up to their ideal self.
See also 
- Rescher, Nicholas (1987). Ethical Idealism: An Inquiry into the Nature and Function of Ideals. Berkeley and Los Angeles, California: University of California Press. ISBN 0520078888.
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