If you read almost any debate on Facebook, or on YouTube you hopefully see Liberals and Conservatives try to battle over who has better command of the facts. Liberals are ignorant. Conservatives are misinformed. I say hopefully because all too often the debates are mindless accusations of stupidity, racism, malice, and vitriol.
Debaters lament if they could just show the other side the facts - that liberals would become conservatives and vice versa. However in the ideological debate between people it is often not about the facts, but it comes down to a difference between vision. Vision is the person's view and belief on how the world works and, according to Thomas Sowell, the difference is so great that it is an irreconcilable Conflict of Visions.
Sowell's book is not easy reading. Essentially he describes that visions fall along two opposing views - the constrained versus the unconstrained.
The Constrained Vision see human nature and the world as unchangeable. Man's nature is limited and self-absorbed. The Constrained Vision places greater reliance upon traditions and customs as guides to better living under the belief that there is "nothing new under the sun" and that mankind has developed these customs after generation upon generation of trial and error. The past and history is a catalogue of trial and error and the lessons of the past are to be conserved as wisdom.
The Constrained Vision is a pessimistic view of human nature - not in the sense that mankind cannot achieve greatness - but that greatness can only be achieved when the limitations of human nature are respected and men and women are free to pursue their own self-interests. The United States Constitution is an excellent example of the Constrained Vision. James Madison wrote, "If men were Angels no government would be necessary. If angels were to govern men, neither external or internal controls on government would be necessary. Federalist No. 51
The Unconstrained Vision views human nature and the world as evolving, improving, and that - as with technology - each generation builds up upon the work of the previous generations. If man's nature is limited and self-absorbed - then you need only to change society in order to change the man. Robert Kennedy summed up the unconstrained vision neatly when he said, "Some men see things as they are and say why. I dream things that never were and say why not." The past and history is not a source of wisdom to be heeded, but instead prejudices and arbitrary social constraints that future generations may (and should) rise above.
Those that believe that government can be used to improve human nature simply have an irreconcilable conflict of vision with those who believe that government cannot improve human nature. From that schism - many unresolvable ideological debates and differences arise.