Text: acute stress is actually a condition of "combat readiness"; this mechanism was a very appropriate arrangement until the lifestyle of modern man became popular.

Correct capitalization: Acute stress is actually a condition of "combat readiness"; this mechanism was a very appropriate arrangement until the lifestyle of modern man became popular.

Text: without a doubt, it's more than worth a visit.

Correct capitalization: Without a doubt, it's more than worth a visit.

Text: game attractive interest tanks ..

Correct capitalization: Game attractive interest tanks ..

Text: the series kicks off on november 25 and ends with a $550,000 guaranteed prize main event on december 2.

Correct capitalization:
The series kicks off on November 25 and ends with a $550,000 Guaranteed Prize Main Event on December 2.