The world depends on fungi, because they are major players in the cycling of materials and energy around the world.

The prices of raw materials do not fluctuate directly with the labour cost of producing them.

Costs of manufactured articles importantly depend on the cost of raw materials as well as labour.

Every major religion today is a winner in the Darwinian struggle waged among cultures, and none ever flourished by tolerating its rivals.

The two major challenges for the 21st century are to improve the economic situation of the majority and save as much of the planet as we can.

Sometimes a concept is baffling not because it is profound but because it is wrong.