Once you set a syncing passphrase, you have to first sign in with your Google account password and then enter the passphrase to set up new synced devices. This adds an important extra layer of security. To set this up, open Settings, click Advanced sync settings, and select Choose my own passphrase.
Landed gentry is a largely historical privileged British social class consisting of land owners who could live entirely from rental income.
In contemporary (capitalist) societies, the term bourgeoisie can refer to middle, upper middle, and/or upper classes, and/or their lifestyle and values. The proletariat (from Latin proletarius, a citizen of the lowest class) is a term used to identify a lower social class; a member of such a class is proletarian. Originally it was identified as those people who had no wealth other than their sons.