In 1929, Paul Dirac’s equations predicted that all of the fundamental particles in nature must have a corresponding "antiparticle."  Quantum field theory now tells us that matter and antimatter particles are always produced in pairs.  If the Big Bang produced equal amounts of matter and antimatter, how come we and everything else we can see consists only of matter?

Less than one microsecond after the big bang; countless energy links were attempted between all particles.  A good number of matter particles met their antimatter counterparts and immediately “annihilated”.  In order to maintain this balance however, every particle would have had to ‘wait around’ until it met its perfect mate so that they could all “annihilate” two by two.

‘Forsaking all others’ was impossible of course, and it was much more probable that particles form links to multiple less-than-ideal ‘partners’.  Contact aggregations of whatever complexity could still form while there were plenty of all types of particles available nearby. 

Despite being random mixtures of particles and antiparticles, things like mass and charge worked out even.  All energy links of particles in the aggregations were devoted exclusively to each other, making them oblivious to everything else.  With no links to the outside, the aggregations disappeared!  Aggregations formed and energy links were released more gradually than in the case of pairs, so there was no radiation. These invisible aggregations were totally inert, and from the outside, appeared to be “annihilated”.   

When an internally satisfied aggregation of unequal numbers of matter and antimatter particles disappeared, it became ‘untouchable’ and an imbalance between matter and antimatter was locked in.  Like the game of musical chairs, some particles out there would never find their ideal mates.

During this “annihilation” phase, only satisfied pairs or aggregations were allowed to survive because they were ‘untouchable’.  As long as there was some of the other type of matter around, anything else was quickly broken up as its constituent(s) were “annihilated”.

The majority of both particles and antiparticles thus went into the production of satisfied high order aggregations, and to a lesser extent, matched pairs; all of which disappeared.

After most of the matter in the universe returned to this invisible and inert state, a relatively insignificant number of particles were left over.  These ‘losers at musical chairs’ had to be either all matter or all antimatter, otherwise they would have continued to meet and pair off!   

Whichever type chance produced, it became what we are made of and we dubbed it the ‘normal’ matter.