Answer: Abraham when he founded Judaism. David when he slayed Goliath. Lastly, Moses when he founded the 10 commandments.
Step-by-step explanation:
I think these are important because if David hadn't slain Goliath, more soldiers would've been killed, if Abraham hadn't founded Judaism, I wouldn't be writing this, If Moses hadn't founded the 10 commandments, god knows what would've happened to civilization.