Trying to get golden age culture with 7 wonders . how is it possible ?

[soul like that be capable of]

I am atm 4/7 wonders i built myself. i am still 40% left before age done but i think there no more wonders i can build besides 1 or 2.
any tips if anyone was able to pull it off. i need 3 more for golden age ?
should i start a war with a civ that built one and steal it ?

[Tricking Trapster]

You can do that, yes. You need to 'house' 7 wonders, you don't have to build all of them yourself.