population also effects LABOR, which is a bonus to all production on the planet. Land mass increases to max space that you can inhabit, thus increasing space for farms, farms increase max population. social increases population growth rate. all of these are effected by terrain and climate.
Martial arts actually is bad in later game because instead of shooting 3 rpgs during rage mode you hit only 1 opponent while getting hit by many others
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population also effects LABOR, which is a bonus to all production on the planet. Land mass increases to max space that you can inhabit, thus increasing space for farms, farms increase max population. social increases population growth rate. all of these are effected by terrain and climate.