Damascus tyres and he later on reached gaza and conquers Egypt
I think its anthropological
Answer:
He wants Zaroff to feel like he's being hunted. Rainsford has now tracked him down and his him on an even playing field. Zaroff is now the one who has to fight to stay alive. Aside from this, I think an ambush would be pretty difficult. Rainsford is unarmed and Zaroff is tucked away somewhere in his great chateau. A sneak attack probably wouldn't be successful.
They wanted to find ways to benefit ordinary citizens.
The use of tobacco is ridiculous. spreading the truth about tobacco would definitely help and just tell them the risks and dangers of it