Why didn't the Jewish people try and escape in the death camp?

Not much chance to escape, with high barbed wire all around, and guards on watchtowers with machine guns. In addition to the low chance of actually escaping, they also did not know who they could trust to tell about the escape. Certainly, it was impossible for one person to escape on his/her own. If they were to get all of the Jews together to escape, they might have been able to pull it off, but as I said, they did not know who they could trust.