saying that religion causes wars is like saying chemicals cause cancer. i have yet to see any living thing that did without chemicals, or any conscious mind that did without beliefs which cannot be concluded by evidence and logic alone.
it is difficult to take seriously anyone who attempts to preclude argument by declaring that disagreement is in itself disqualifying evidence - and probably not worth the effort to do so.
I think this is highly dependent on what you consider a "belief." If belief strictly means religion, I couldn't disagree more, agnostics being the clearest example. Or are we talking about beliefs like "I believe my wife isn't cheating on me." Even then, one could argue that you logically think that because you have a good relationship, or she is a very loyal person in general, or maybe you're just good at laying the pipe. I honestly have a hard time agreeing that
no person can only have beliefs backed in evidence and logic.
I believe that Aminorex's point is valid, and there is NO person who does NOT make leaps of faith in his/her daily activities. Whether those leaps of faith rise to the level of a religion may be another story. Sometimes our leaps of faith are about matters that are so trivial no one would call those particular believes as part of a religion b/c they may NOT be part of any regular routine practice or deeply held. An atheist may deny that some of his/her practices are religious, yet many atheists, if interviewed (or interrogated) would end up disclosing that his/her logic only carries so much of the burden. Even within belief systems, some individuals are highly reflective and introspective, and others could NOT be bothered with such, unless you catch them on a "good" day in which they have been well fed, well rested and generally NOT preoccupied by real concerns, such as the volatility of BTC prices.