They were some of the early thinkers on what could we do to not waste things.

This is one example of why Democritus is considered to be an early scientific thinker.

Other early socialist thinkers were influenced by the classical economists.

The early religious thinkers of our race saw that as a punishment.

Epicurus was an early thinker to develop the notion of justice as a social contract.

It is about a philosophical connection to early reformed thinkers.

A variety of early thinkers in the humanistic sciences took up Hume's direction.

However, earlier thinkers and written works have promoted agnostic points of view.

A number of earlier thinkers and writings have also explored agnostic thought.

Although paleontology became established around 1800, earlier thinkers had noticed aspects of the fossil record.