The only people who steal are thieves, and that's a very small percentage of civilization. Most people want to have some way to make the economic transaction valid. They want to return the favor, if you will... return the benefit and reciprocate.
In order to govern, the question is not to follow out a more or less valid theory but to build with whatever materials are at hand. The inevitable must be accepted and turned to advantage.
The common question that gets asked in business is, 'why?' That's a good question, but an equally valid question is, 'why not?'
I just think my children and your children would be much better off and much more successful getting married and raising a family, and I don't want them brainwashed into thinking that homosexuality is an equally valid and successful option - it isn't.
It is nice to have valid competition; it pushes you to do better.
Let me explain something about guitar playing. Everyone's got their own character, and that's the thing that's amazed me about guitar playing since the day I first picked it up. Everyone's approach to what can come out of six strings is different from another person, but it's all valid.
I don't think there should be a hierarchy of what is valid in the arts.
No apparent, perceived, or claimed evidence in any field, including history and chronology, can be valid if it contradicts the Scriptural record.
I would be absolutely astounded if population growth and industrialisation and all the stuff we are pumping into the atmosphere hadn't changed the climatic balance. Of course it has. There is no valid argument for denial.
The use and threat of force, when world peace is not in danger, are no longer valid frames of reference for achieving the ends sought today by sovereign nations.