When talking abouts facts should we use would or will ?
- There would/will be no life without water.
- There would/will be no women without men.
- There would/will be no theft without thieves.
The choice of verb depends on the context.
Imagine a situation in which a farmer learns that the river on which his cattle depend has dried up completely.
He would then state:
There will be no life without water.
But if the river was only drying up gradually, threatening the future existence of the farm, the farmer might say:
There would be no life without water.
That's to say that that the first statement addresses an unconditional situation; it is simply a statement of fact.
The second statement addresses a hypothetical situation that might or might not be realised. The result depends on certain conditions being met - no water, no men, no thieves.
Practically, I can't see any difference between them.
The only difference is in that a hypothetical situation "would" can work for past, present, and future, while the conditional situation "will" works only for future.