it exists, but it's not static. in some contexts, dudes can be beta, in others, they are alpha.
some people act as alpha males in every context, but end up looking stupid because they're in over their head. thus making them beta males
this can be situation to situation or it can be an evolution over time. betas can become alphas and alphas can become betas.
so all in all, be confident in yourself and this shyt takes care of itself.
I hate this whole beta/alpha thing.
If your neck under 16.5" your appearance demands no respect.