Evil Understood as Potential

     Is it possible to live in a world without evil? The easy response is no,but why? Is evil just lurking around every corner waiting for the next opportunity for destruction? Well, only if a human is there. What do i mean?  Is the only way that evil exists is because humans manifest it out of potential?  Why can you go out with friends for dinner and bad things not "just happen?"  What would a world be like without evil?  The suffering from evil starts off with things like white lies, then progress to the most heinous things we can imagine.  Why do we continue unlocking the doors of evil even though we know right from wrong?