  The flavor democracy hypothesis was introduced in seventies taking in mind
three Standard Model (SM) families. Later, this idea was disfavored by the
large value of the t-quark mass. In nineties the hypothesis was revisited
assuming that extra SM families exist. According to flavor democracy the fourth
SM family should exist and there are serious arguments disfavoring the fifth SM
family. The fourth SM family quarks lead to essential enhancement of the Higgs
boson production cross-section at hadron colliders and the Tevatron can
discover the Higgs boson before the LHC, if it mass is between 140 and 200 GeV.
Then, one can handle "massless" Dirac neutrinos without see-saw mechanism.
Concerning BSM physics, flavor democracy leads to several consequences:
tan(beta) approx.eq. 40 if there are three MSSM families; super-partner of the
right-handed neutrino can be the LSP; relatively light E(6)-inspired isosinglet
quark etc. Finally, flavor democracy may give opportunity to handle "massless"
composite objects within preonic models.
