'Ruler' in the Bible

I saw all the living under the sun round the young man who was to be ruler in place of the king.

No man has authority over the wind, to keep the wind; or is ruler over the day of his death. In war no man's time is free, and evil will not keep the sinner safe.

The calm words of the wise are heededmore than the shouts of a ruler over fools.

If the spirit of the ruler rise up against thee, leave not thy place; for yielding pacifieth great offences.

There is an evil which I have seen under the sun, as an error which proceedeth from the ruler:

Happy is the land whose ruler is of noble birth, and whose chiefs take food at the right time, for strength and not for feasting.