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Evolution is a process by which organisms pass slowly and by degrees to a different stage or state; those organisms most suited to their environment advance and become more dominant, while those which don't 'keep up', or 'measure up' - in other words, don't survive as successfully - gradually disappear, or lose their contra-survival characteristics and evolve into a more successful strain.

If humans have a major predator and that predator evolves to become a better predator, then the evolution of that predator is harmful to humans. But humans will develop new survival characteristics and strategies to deal with such threats; over time it balances out.

Humans have no major predators in the higher animal kingdom; there do exist creatures which occasionally kill or injure us, but we aren't usually their natural prey; our most important predators are microscopic organisms such as viruses and bacteria.

We can develop our own immune systems to cope with these as they develop more efficient ways to attack our immune systems. More visibly, our researchers constantly work on new ways to block these tiny predators, as well as on new ways to fight their adverse effects on us.

The little predators have predators of their own, which evolve with them in a constant effort to beat them.

So, we cannot say that evolution is harmful to humans; the pendulum swings both ways, back and forth, and keeps swinging all the time.

Of course, like all scientific theories, the concept of evolution is frequently at odds with religious groups and other scientific groups who believe there is no such thing. Fundamentalist Christians, for example, believe that the entire earth was created as it now is in a few days by a supreme entity, and that it has remained and will remain just the same forever.

Given this conflict, which can involve powerful and influential political factions within churches - not just Christian churches - it might do you little good to chat cheerfully about evolution if you live and work in a community where the dominant church and its scientists demand people (not simply the church's own members) reject the concept of evolution in favour of whatever that church believes to be true.

In that situation, evolution could prove in some ways harmful to you as far as career prospects and a peaceful life are concerned, but such fundamentalist communities are pretty rare and easily avoided.

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Q: How is evolution harmful to humans?
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