For example, in many Asian novels, power, wealth and opportunity is seen as an often vicious 0 sum game. Clans only have enough resources to put into 1 person. The throne of the kingdom only has enough space for 1 king, and it's a vicious fight to the top. There's only 1 space left for the exam and there's millions of people applying.
In the US, there is always the theme of you can find something better out there. Just move west. Opportunity is out there. You can pull yourself up by your bootstraps.
One thing Americans take for granted is the vast number of undeveloped resources and new opportunities America has had for the past 300 years that has shaped their thinking to be the way it is. Opportunity and exploration was abundant every century of US history - 1700s with the pilgrims, 1800s with the move west, 1900s with the reset of the world economy due to both world wars. You can make a claim that the least opportunistic time of the US is the modern era, which might be why we currently have so much complaints and unrest.
In contrast, I think China's relatively well developed historical and social maturity (it's at least 5000 year rich history) has embedded the thought of the 0 sum game into it's culture. Western Europe also seems to have similar themes. Would love if people from those backgrounds could share their perspective.