Philosophers have argued over it, kings have fought over it, and theologians have pored over it – power and who posesses it has been one of the hottest and most bloody disputes in the history of humankind. But, there are limits to human power and there are forces much greater than any human ruler can muster. These are embedded in our belief systems, our technologies, and our cultures. These are the things that really rule our lives.

Here, five science writers give us their views about what they think drives the cogs of our daily existence. Read what they say and have your say. Take a vote or make your own suggestions in the forum.