SteelHead wrote:...(snip)...but there is no way you can show/prove that there is a universal and/or external definition of right and wrong. Each individual ultimately decides for him or herself, under the influence of their society, culture, upbringing environment etc.
Sure there is a way...more of a way than you can show to support your self-centered premise of "I am the meaning of it all" theory of good and evil.
For example:
1. Human beings share common behaviors and feelings thus morality can be transcendent.
2. I have never claimed that indoctrination was necessary for morality, see also the noble savage....just that morality must rely on an external, likely supernatural source.
3. Secular morality, somewhat of what you seemingly subscribe to, relies on goals and not methods to attain those goals...thus it relies on a philosophy of the "ends justify the means" mentality....or perhaps more of a secular humanist, by which truth may only be derived from science and thus, currently, that position must accept the fate of being unable to choose otherwise...therefore personal accountability, or, as you say above, "deciding for oneself" is impossible....science currently eliminates the possibility to transcend the laws of nature, making it impossible to divert the chemical reactions which create your thoughts.
4. Without God (or even gods) it is impossible to justify moral behavior metaphysically and thus it is impossible to frame a coherent argument for any moral standard....this is why the most honest of atheists recognize and admit that they are, in fact, amoral.
5. From a secular position, an "inner" feeling/urge to behave "morally" is unable to be considered "moral" over any other urge or feeling...there is no inherent reason present.
6. I am not stating that being an atheist makes a person necessarily immoral, just that the atheist can not honestly offer an objective reasoning why they would or would not exhibit moral behavior.
7. Principles by which actions are judged is what constitutes moral behavior, and these principles must be founded on that which is transcendent. These principles are the "fabric" mentioned before and hinted at with #1 on this list.
8. Why start at ground zero when one can have a 6,000 year head start? Even a good scientist does not bother to re-prove the forces of gravity for himself before he proceeds to design a new airplane - why would you do the same with morality?