Whenever times or circumstances change, people’s concept of truth changes with it. So what is truth?

This issue’s Bio Vision looks at one of the most influential economists of all time, John Maynard Keynes.

Best known for An Inquiry Into the Nature and Causes of the Wealth of Nations, Adam Smith is credited with establishing the discipline of political economics.

Wisdom seems to be an increasingly rare commodity. Why, and what can we do to develop it?

In pioneering the philosophy called positivism, August Comte had a profound effect on the most noted philosophers of the 20^th century.

One of the intellectual  giants of the 20^th century, Bertrand Russell earned the acclaim of a Nobel Prize and the reprimand of two prison sentences.

Religion has its intellectual critics, but there is much more to be skeptical about in the smorgasbord of other philosophies available today.

Looking at his early life, no one could have known the impact Friedrich Nietzsche would have on society. But in his final years he was not at peace.

The influence of Theodore Roosevelt and Woodrow Wilson on foreign policy.

David Hume, Scottish philosopher, historian, and leading neoskeptic, was a highly controversial figure in 18^th-century Britain.