You can't use StarCraft as a example of logical violence because both species are fictional and created with the intent of conflict.
Free will and choice are the option to overrule primal base instincts with logic and reason. Thus there is a correct choice that everyone should choose: logic and reason over primal base instincts. What makes it choice is that there are still two options.
"Progress" is a vague concept, true, with many different directions. However, there is one universal goal.
I ask you: what is the most valuable thing in the universe?
Water? Gold? Knowledge? Free will? No.
The answer is obviously, simply, life itself. Because only life can attribute value to itself, other life, and the environment it lives in.
So, it necessitates that the absolute base goal of all life is the propagation and continued existence of life. In the natural world, this sometimes requires sacrifice, true. Viruses kill other creatures as they reproduce inside cells. Parents will eat their own young to ensure they can reproduce again, and that their strongest offspring flee.
Humanity has the same, innate goal. As an aside, Abrahamic religion may be wrong on many, many things, but the drive to have lots of children is not one. Its when the enforcement of that belief creates young who cannot be properly nurtured, often due to poverty, and then discourages curiosity and experimentation, that things go astray.
What mankind can choose is to limit sacrifice as much as possible. It is said, the needs of the many outweigh the needs of the few. As such, sacrifices must still be made and I cannot deny that. But those are in extreme survival circumstances, emergencies.
They do not include war. War is not sacrifice, it is greed. Someone wants something - land, resources, power. Instead of coming to a mutually beneficial arrangement through trade and unity, they choose division and death so they can acquire said thing and not share it. For war to be sacrifice, it would have to be against a foe that is not capable of logical discourse - unsapient, or so completely alien that both sides cannot ever understand eachother.
Which brings us back to StarCraft. 3 alien species, fighting over resources. If they could not communicate, then perhaps war is truly inevitable. But that is not the case. All 3 species could communicate with each other, sapient, possessing of logic and filled with free will. They could of held discourse. They could have found a solution that benefitted everyone. They chose not to, and I will forever maintain that was the wrong choice.

