Final answer:
Mark Antony's excessive drinking and passionate love for Cleopatra led to his ruin.
Step-by-step explanation:
Mark Antony's ruin can be attributed to his excessive drinking and his passionate love for Cleopatra, which was as strong as wine. Antony's excessive indulgence in alcohol and his intense infatuation with Cleopatra led to a decline in his mental and physical health, ultimately causing his downfall.