EstrEdit

Could you clarify what you mean by "Estr"? The term could refer to several different things (for example, a biological root related to estrogen/estrus, a geographical name or locality, an acronym in a policy or economic context, etc.). Once I know which sense you want, I can write a properly structured encyclopedia article from a conservative/libertarian-leaning perspective, including the required internal encyclopedia links, Markdown formatting, and the See also section.