Why do Venus and Mercury have stable axial tilts without moons?

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iced199
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All of you may have heard this. Without the Moon, Earth's axis would fly wildly out of control due to the other planets' gravity. Now, that makes sense, the Moon giving a stabilizing effect. But what confuses me is why Venus and Mercury both have near 0 degrees of tilt. They don't have a moon to stabilize them, so why are their axis' not flailing out of control? Is it something to do with Earth's distance from Jupiter and the Sun? I'd like to hear your ideas on this. Thanks.
 

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All of you may have heard this. Without the Moon, Earth's axis would fly wildly out of control due to the other planets' gravity.

Do you have any references for this claim? That doesn't sound right to me at all.
 
nicksauce said:
Do you have any references for this claim? That doesn't sound right to me at all.

No, not really. I mean, I have heard it lots of times, just wondering if it was actually true.

...I should really stop believing everything I hear now that you mention it...