New rules reiterate that speakers are barred from advocacy of political candidates and ballot measures. (Reuters Archive)

Alphabet Inc’s Google has tweaked its rules for inviting guest speakers to its offices, days after it cancelled a talk by an Indian historian who has disparaged marginalised groups, especially Muslims, and their concerns, according to company emails seen by Reuters news agency.

The policy released on Thursday is Google’s latest effort to preserve an open culture while addressing divisions that have emerged as its workforce has grown.

Workers at Google and other big tech companies in recent years have clashed and protested over politics and racial and gender equity.

Also, Alphabet, Apple Inc and Inc all face union organising drives whose demands include that the companies adopt progressive policies.

The Google speaker rules, seen by the Reuters news agency, cite risk to the brand from certain talks and ask workers to “consider whether there’s a business reason for hosting the speaker and if the event directly supports our company goals.”

This story was originally published in . Read the full story here