How to pronounce “stratum” in English

Let's say, if you're part of a lower stratum society, how are you gonna make sure that your children are gonna have a better life than you?

still be in harmony with society, seeing all these rich people make tons of money and you're still belonging to that lower stratum,

It's about, for example, the neighborhood you live in or the social stratum that you happen to have been born in.