The brother of David Haines, the British aid worker beheaded by Islamic militants, has appealed for "every community, every faith" to unite against Islamic State.
Michael Haines issued a moving tribute to the "kind, caring" 44-year-old on the eve of a memorial service in Perth, saying that "together we have the power to defeat the most hateful acts".
David Haines had been helping refugees in Syria in a camp near the Turkish border when he was snatched by IS militants last year. IS released a video showing his murder last month.
In a recorded message, his brother said: "David would want us all to remember that extremism, terrorism and the mistreatment of people is not something that just happens to those thousands of miles away.
"It's something that affects us all in the UK too. My brother's killers want to hurt all of us and stop us believing in the very things which took David into conflict zones - charity and human kindness.
"I am calling on all of us - every community, every faith - in the coming weeks and months, to find a single act of unity. One simple gesture, one act, one moment that draws people together.
"My brother didn't see other nationalities or religions, he just saw other human beings in need of a real help to get by, or sometimes a lot of help to live to see another day.
"This is how my family will remember him, and we hope you all will too - a man full of kindness, open and caring, willing to cross the road to help others."
Michael Haines will address family, friends and colleagues at a service at Perth Congregational Church later this afternoon.
David Haines, who was born in Yorkshire and brought up in Perth, has a teenage daughter, Bethany, from a previous marriage and a four-year-old daughter in Croatia with his widow Dragana Prodanovic Haines.
His brother said David's death had broken the family's heart but they had been "overwhelmed" by messages of support from the British public and people all over the world.
He said: "I am recording this message in the hope that people across Britain will listen to my family's story and understand that the fight against terrorism and extremism isn't something that happens to other people, it affects us all.
"How we react to this threat is also about all of us. Together we have the power to defeat the most hateful acts.
"Acts of unity from us all will in turn make us stronger, and those who wish to divide us weaker."