Gerrymandering is the dividing of a state, country, etc. into electoral districts so as to give one political party a majority in many districts while concentrating the voting strength of the other party into a few districts as possible.
The part in control uses it to control the voting district by “cracking” which means diluting the voting power of the opposing party’s supporters across an abundance of districts. Or use it as “packing” which means concentrating the opposing party’s voting power in one district to reduce their voting lower in other districts.
No, almost nothing is inevitable in history
At that time the resources and especially money is scarce since the economy is just starting to recover again after the war. The businessmen needs cash or capital to simply buy and sell goods or to start a business.
i hope my answer helped you.